#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;

void IO(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
}

long long modinv(long long a, long long m) {
	long long b = m, u = 1, v = 0;
	while (b) {
		long long t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= m;
	if (u < 0) u += m;
	return u;
}

int main(){
  IO();
  ll t;
  cin>>t;
  while(t--){
    string s;
    cin>>s;
    ll n=s.size();
    ll m;
    cin>>m;
    ll num1=0;
    for(ll i=0;i<n;i++){
      num1*=10;
      num1+=(s[i]-'0');
      num1%=2*m;
    }
    ll num2=num1+1;
    ll ans=(num1*num2)%(2*m);
    ans/=2;
    cout<<ans<<endl;
  }
}