1 #include<iostream>

 2 #include<cstring>

 3 #include<cstdio>

 4 #include<cmath>

 5 #include<cstdlib>

 6 #include<algorithm>

 7 #include<iomanip>

 8 using namespace std;

 9 int main(){

10     int t,c;

11     double a,b;

12     cin>>t;

13     while(t--){

14         cin>>a>>b>>c;

15         double ans=pow(a,exp(1))*1.0/b;

16         cout<<setiosflags(ios::fixed)<<setprecision(c)<<ans<<endl;

17     }

18 }