该程序借助Java实现了任意大小的实数的乘法，可对任意大小的实数进行加减乘除运算。该算法速度快，且没有错误.这里以计算100的阶乘作为示例，来演示算法的高效及正确性。该算法已经优化，可以在一秒钟以内计算出100以内的阶乘。-The procedure asked for help of Java to carry out arbitrarily the multiplication of the real amount of size, can to arbitrarily the real amount of size carry on adding and subtracting to multiply by in addition to operate. The calculate way s speed is quick, and has no mistake. Here with compute 100 of rank s multiplying by is an example, play to show calculate way efficiently and accuracy. The calculate way already excellent turn, can at a second in compute 100 in of the rank multiply by.