一个大数，通过添加断点可以将其分为若干个小数，而这几个小数的乘积最大是多少呢？本程序可以通过回溯法求解这个最大数乘积。(A large number, by adding breakpoints can be divided into a number of decimal and decimal the largest product is how much? This procedure can be the product of the maximum number of backtrac