JAVA

java biginteger multiply

import java.math.BigInteger;

BigInteger num1 = new BigInteger("someNumber");
BigInteger num2 = new BigInteger("someNumber");

BigInteger result = num1.multiply(num);

java biginteger multiply

BigInteger int1 = new BigInteger("131224324234234234234313");
BigInteger int2 = new BigInteger("13345663456346435648234313");
BigInteger result =  int1.multiply(int2)