#include<bits/stdc++.h>
using namespace std;
double a[2][3]= {{0.6,0.3,0.1},{0.1,0.4,0.5}};
double p[2][2]= {{0.6,0.4},{0.7,0.3}};

int main()
{
    double sum=0;
    for(int i=0; i<2; i++)
    {
        for(int j=0; j<2; j++)
        {
            for(int k=0; k<2; k++)
            {
                sum+=(a[i][0]*a[i][1]*a[i][2])*(p[0][i]*p[i][j]*p[j][k]);
            }
        }
    }
    printf("%lf\n",sum);
    return 0;
}