Multiply two positive numbers

multiply.py

class Solution:
    
    def getSum(self, nums_list, limit):
        # accepts nums_list, array of numbers in reversed order eg, [ [1, 3], [3, 2] ] == 31+23
        res = []
        iters = [ iter(nums) for nums in nums_list];
        carry = 0
        for i in range(limit):
            val = carry
            for _iter in iters: val += next(_iter, 0) 
            carry, digit = val // 10, val %10
            res.append(digit)
        
        res.reverse()      
        # skip leading zeroes
        i = 0;
        while i < len(res) and res[i]==0: i++
        ans = res[i:]
        return ans if len(ans) > 0 else [0];
    
    
    def getMultiplication(self, first, second):
        # accepts two arrays denoting numbers to be multiplied
        res = []
        for i, s_num in enumerate(reversed(second)):
            carry, rowVal = 0, [0] * i
            for f_num in reversed(first):
                val = f_num * s_num + carry          
                carry, digit = val // 10, val % 10
                rowVal.append(digit)
                
            if carry > 0: rowVal.append(carry)
            res.append(rowVal)
            
        return self.getSum(res, len(first) + len(second));