#include<bits/stdc++.h>

using namespace std ;

int main ()
{
    double t, v, w ;
    cin >> t >> v ;
    if (abs(t) <= 50 || v <= 120 || v >= 3 )
    {
        w = 35.74 + 0.6215*t+(0.4275*t - 35.75)*pow(v,0.16) ;
    }

    cout << fixed << setprecision(2) << w ;
    return 0 ;
}