#include <iostream> #include <string> #include <cstdio> #include <algorithm> #include <cmath> using namespace std; //利用字符串得到两个数的位数 string a, b; int main() { cin >> a >> b; int alen = a.length(), blen = b.length(); int fa = stoi(a), fb = stoi(b);//转化为整型 int tempa = 0, tempb = 0; for (int i = 0; i < alen; i++) { tempa += fa % 10; fa = fa / 10; } for (int i = 0; i < blen; i++) { tempb += fb % 10; fb = fb / 10; } cout << tempa * tempb << endl; }