func_code_string: #include <bits/stdc++.h>   using namespace std;      #define int int64_t   #define MOD 998244353   #define inf 9e18   #define tikoo (int) (1e9 + 7)      template<typename T, typename T1> T max(T a, T1 b) { if (b > a) a = b; return a; }   template<typename T, typename T1> T min(T a, T1 b) { if (b < a) a = b; return a; }   int fastpow(int a, int b, int m = tikoo) { int res = 1; a %= m;       while (b > 0) { if (b & 1) res = (res * a) % m; a = (a * a) % m; b >>= 1; } return res; }      signed main() {       ios_base::sync_with_stdio(0);       cin.tie(0), cout.tie(0);       int t = 1;       cin >> t;       while (t--) {           int n, k;           cin >> n >> k;           cout << fastpow(n, k) <<   n ;       }       return 0;   }   