func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t--) {       long long A, B;       cin >> A >> B;       long long hb = (floor(log10(B + 1)) == log10(B + 1)) ? (floor(log10(B)) + 1)                                                            : floor(log10(B));       cout << hb * A << endl;     }     return 0;   }   