#include<iostream>
#include<stdio.h>

using namespace std;

long long factorial(int num)
{
    long long data = 1;

    for(int i=2;i<=num;i++)
    {
        data = data * i;
    }

    return data;
}

long double make_prob(int percent, int win_cnt, int lose_cnt)
{
    long double prob = 1;

    for(int i=0;i<=win_cnt;i++)
    {
        prob *= (double)percent / 100;
    }

    for(int i=0;i<lose_cnt;i++)
    {
        prob *= ((100 - (double)percent) / 100);
    }

    return prob;
}

int main(void)
{
    int loop = 0;
    int case_cnt;

    int percent;
    int be_win;

    int win_cnt;
    int lose_cnt;
    int round_cnt;

    long double total_prob = 0;
    long double this_prob;
    long long this_case;

    long double result[1010];

    cin >> case_cnt;

    while(loop < case_cnt)
    {
        cin >> percent >> be_win;

        win_cnt = be_win - 1;

        for(int i=0;i<be_win-1;i++)
        {
            lose_cnt = i + 1;
            round_cnt = win_cnt + lose_cnt;

            this_case = factorial(round_cnt) / (factorial(win_cnt) * factorial(lose_cnt));
            this_prob = make_prob(percent, win_cnt, lose_cnt);

            total_prob = total_prob + ((long double)this_case * this_prob);
        }
        total_prob = total_prob + make_prob(percent, win_cnt, 0);

        result[loop] = total_prob;

        total_prob = 0;
        loop++;
    }


    for(int i=0;i<case_cnt;i++)
    {
        printf("%.0lf\n",result[i] * 100);
    }
}