#include<iostream>
#include<stack>
using namespace std;
int main()
{
stack<int> mystack;
int t,m,k;
double b,a;
cin>>t;
while(t--)
{
int c,x[100],d=0,i=0,count=0;
cin>>b>>k;
m=b;
a=b-m;
while(m)
{
c=m%k;
m=m/k;
mystack.push(c);
}
while(1)
{
d=a*k;
if(d>=k)
break;
a=a*k;
x[i++]=d;
count++;
}
while(!mystack.empty())
{
if(mystack.top()<10)
{
cout<<mystack.top();
mystack.pop();
}
else
{
switch(mystack.top())
{
case 10: cout<<"A"; mystack.pop(); break;
case 11: cout<<"B"; mystack.pop(); break;
case 12: cout<<"C"; mystack.pop(); break;
case 13: cout<<"D"; mystack.pop(); break;
case 14: cout<<"E"; mystack.pop(); break;
case 15: cout<<"F"; mystack.pop(); break;
}
}
}
cout<<".";
for(i=0;i<count;i++)
cout<<x[i];
cout<<endl;
}
return 0;
}