백준 1225 이상한 곱셈

https://www.acmicpc.net/problem/1225

1225번: 이상한 곱셈

a, b = input().split()
int_b = 0
for i in range(len(b)):
    int_b += int(b[i])
result = 0
for i in range(len(a)):
    result += (int(a[i])*int_b)
print(result)

a, b = input().split()
result = 0
for i in range(len(a)):
    for j in range(len(b)):
        result += (int(a[i])*int(b[j]))
print(result)