Help me in solving BIGSALE problem

help
,
1

My issue

how to increase the precision

My code

#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin>>t;
    while(t--){
        float loss;
        int n;
        cin>>n;
        loss = 0.000000000;
        for(int i=0; i<n; i++){
            float p, q, d;
            cin>>p>>q>>d;
            loss+=q*p*(1.000000000-(1.000000000+(d/100))*(1.000000000-(d/100)));
            
        }
        cout<<loss<<endl;
    }
	// your code goes here

}

Problem Link: A Big Sale Practice Coding Problem

2

cout<<fixed<<setprecision(6)<<loss<<endl;