using namespace std;

int main(){ int i,N; double X,Y; double result; cin>>N; for(i=0;i<N;i++){ cin>>X>>Y; if(X<0 && Y>X){ cout<<"divisao impossivel"<<endl; }else{ result = X / Y; cout.setf(ios::fixed,ios::floatfield); cout.precision(1); cout<<result<<endl; } } return 0; }