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my program reads om tje number of liters of gasoline per 2 cars and the number of miles traveled by a car and then its supose to output the number of miles per gallon the car delivered. I used .264179 as my conversion of liters to gallons. Everything seems fine but my number returns as a infinitive.

here's the code

```
#include <iostream>
#include <cmath>
using namespace std;
double liters;
double gallons = liters * .264179;
char ans;
double find_mpg( double miles, double liters);
int main()
{
do
{
double miles;
cout << "enter the number of liters used in the first car\n";
cin >> liters;
cout << "how many miles did you travel in the first car\n";
cin >> miles;
double mpg = find_mpg(miles, liters);
cout << "this is your fuel eficiency: \n";
cout << mpg << " Miles per gallon\n";
cout << "enter the number of liters used in the second car\n";
cin >> liters;
cout << "how many miles did you travel in the second car\n";
cin >> miles;
cout << "this is your fuel eficiency for second car: \n";
cout << mpg << " Miles per gallon\n";
cout << "do you want to calculate again\n?";
cout << "press Y to recalculate and N to stop";
cout << "and then press return: ";
cin >> ans;
} while (ans == 'y' || ans == 'Y');
}
double find_mpg(double miles, double liters)
{
double ans = miles / gallons;
return ans;
}
```

Please help me out, I'm guessing my math is wrong somewhere,

thanks for any help.