#include <iostream>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;

i64 testcase(){
    i64 N, K; cin >> N >> K;
    // most significant digit of K
    i64 msd = 1; while(msd <= K/10) msd *= 10;
    
    i64 ans = 0;
    {
        // msd increasing
        i64 kmsd = msd;
        i64 k = K;
        while(kmsd <= N){
            ans += min(k, N+1) - kmsd;
            kmsd *= 10;
            k *= 10;
        }
    }
    {
        // msd decreasing
        i64 kmsd = msd;
        i64 k = K;
        while(true){
            kmsd /= 10;
            k /= 10;
            if(kmsd == 0) break;
            if(kmsd <= N){
                ans += min(k, N) + 1 - kmsd;
            }
        }
    }
    // K itself
    return ans + 1;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T; cin >> T;
    for(int t=0; t<T; t++) cout << testcase() << '\n';
    return 0;
}