Examples of java.math.BigDecimal.multiply()

java.math.BigDecimal.multiply()
Returns a {@code BigDecimal} whose value is (this ×multiplicand), and whose scale is {@code (this.scale() +multiplicand.scale())}. @param multiplicand value to be multiplied by this {@code BigDecimal}. @return {@code this * multiplicand}

            if (workEfforts != null && orderItem.getString("orderItemTypeId").compareTo("RENTAL_ORDER_ITEM") == 0) {
                Iterator<GenericValue> weIter = UtilMisc.toIterator(workEfforts);
                while (weIter != null && weIter.hasNext()) {
                    GenericValue workEffort = weIter.next();
                    if (workEffort.getString("workEffortId").compareTo(orderItem.getString("orderItemSeqId")) == 0)    {
                        itemTotal = itemTotal.multiply(getWorkEffortRentalQuantity(workEffort)).setScale(scale, rounding);
                        break;
                    }
//                    Debug.logInfo("Item : " + orderItem.getString("orderId") + " / " + orderItem.getString("orderItemSeqId") + " = " + itemTotal, module);
                }
            }

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                        GenericValue WorkOrderItemFulfillment = iter.next();
                        GenericValue workEffort = null;
                        try {
                            workEffort = WorkOrderItemFulfillment.getRelatedOneCache("WorkEffort");
                        } catch (GenericEntityException e) {}
                        result = result.multiply(getWorkEffortRentalQuantity(workEffort));
                    }
                }
            }
        }

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                    if (originalOrderItemQuantity.signum() != 0) {
                        if (adj.get("amount") != null) {
                            // pro-rate the amount
                            // set decimals = 100 means we don't round this intermediate value, which is very important
                            amount = adj.getBigDecimal("amount").divide(originalOrderItemQuantity, 100, ROUNDING);
                            amount = amount.multiply(billingQuantity);
                            // Tax needs to be rounded differently from other order adjustments
                            if (adj.getString("orderAdjustmentTypeId").equals("SALES_TAX")) {
                                amount = amount.setScale(TAX_DECIMALS, TAX_ROUNDING);
                            } else {
                                amount = amount.setScale(invoiceTypeDecimals, ROUNDING);

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                    }


                    // prorate the adjustment amount by the returned amount; do not round ratio
                    BigDecimal ratio = quantity.divide(returnItem.getBigDecimal("returnQuantity"), 100, ROUNDING);
                    BigDecimal amount = adjustment.getBigDecimal("amount");
                    amount = amount.multiply(ratio).setScale(DECIMALS, ROUNDING);
                    if (Debug.verboseOn()) {
                        Debug.logVerbose("Creating Invoice Item with amount " + adjustment.getBigDecimal("amount") + " prorated to " + amount
                                + " for return adjustment [" + adjustment.getString("returnAdjustmentId") + "]", module);
                    }

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                // add our supplier product and cost of this line to the data
                if (supplierProduct != null) {
                    union.putAll(supplierProduct.getAllFields());
                    BigDecimal lastPrice = supplierProduct.getBigDecimal("lastPrice");
                    amountTotal = amountTotal.add(lastPrice.multiply(requiredQuantity));
                }


                // for good identification, get the UPCA type (UPC code)
                GenericValue gid = gids.get(productId);
                if (gid == null) {

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                GenericValue item = itemsIter.next();
                BigDecimal quantity = item.getBigDecimal("returnQuantity");
                BigDecimal price = item.getBigDecimal("returnPrice");
                if (quantity == null) quantity = ZERO;
                if (price == null) price = ZERO;
                creditTotal = creditTotal.add(price.multiply(quantity).setScale(decimals, rounding));
            }


            // add the adjustments to the total
            creditTotal = creditTotal.add(adjustments.setScale(decimals, rounding));

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                    case OPERATOR_SUBTRACT:
                    case OPERATOR_NEGATIVE:
                        resultValue = resultValue.subtract(calcop.calcValue(methodContext, scale, roundingMode));
                        break;
                    case OPERATOR_MULTIPLY:
                        resultValue = resultValue.multiply(calcop.calcValue(methodContext, scale, roundingMode));
                        break;
                    case OPERATOR_DIVIDE:
                        resultValue = resultValue.divide(calcop.calcValue(methodContext, scale, roundingMode), scale, roundingMode);
                        break;
                    }

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            for (GenericValue paymentApplication : paymentApplications) {
                invoiceApplied = invoiceApplied.add(paymentApplication.getBigDecimal("amountApplied")).setScale(decimals,rounding);
            }
        }
        if (UtilValidate.isNotEmpty(invoiceApplied) && !actualCurrency) {
            invoiceApplied = invoiceApplied.multiply(getInvoiceCurrencyConversionRate(delegator, invoiceId)).setScale(decimals,rounding);
        }
        return invoiceApplied;
    }
    /**
     * Method to return the total amount of an invoice which is applied to a payment

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                            }
                            dispatcher.runSync("createShipmentPackageContent", inputMap);
                        } catch (GenericServiceException e) {
                            return ServiceUtil.returnError(UtilProperties.getMessage(resource, "ManufacturingPackageConfiguratorError", locale));
                        }
                        totalWidth = totalWidth.add(qty.multiply(productDepth));
                        if (qty.compareTo(maxQuantity) == 0) shipmentPackageSeqId = null;
                        remQuantity = remQuantity.subtract(qty);
                    }
                }
            }

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     */
    private double getExpectedProbability(int successes)
    {
        double prob = Math.pow(p, successes) * Math.pow(1 - p, n - successes);
        BigDecimal coefficient = new BigDecimal(binomialCoefficient(n, successes));
        return coefficient.multiply(new BigDecimal(prob)).doubleValue();
    }




    private BigInteger binomialCoefficient(int n, int k)
    {

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