#include<stdio.h>int main()
{
int ji(int a,int b);
int N;
int m,n,a;
scanf("%d",&N);
while(N--)
{
scanf("%d%d",&m,&n);
a=ji(m,n);
printf("%d\n",a);
}
}
int ji(int a,int b)
{
int i,j;
int c=0;
for(i=1;i<=a;i++)
{
j=i;
while(j%b==0)
{
c++;
j=j/b;
}
}
return c;
}