How would I code this algorithm into Java to multiply to custom BigInts?
/* An Example of Algorithm (921 * 54)
* [1,2,9] <- a reversed
* [4,5] <- b reversed
* revProd = [0,0,0,0,0] <- initial revProd
* summand = [1,2,9]*4 = [4,8,6,3], revProd = [4,8,6,3,0]
* summand = (0)[1,2,9]*5 = (0)[5,0,6,4], revProd = [4,3,7,9,4]
* product = [4,9,7,3,4]
*/