---

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    double x = 1.674;
    double y = -0.533;
    double d;

    d = pow(1 - exp(x * y), 2) /
        (0.7 * log10(abs(1 - x * x)));

    cout << "d = " << d << endl;

    return 0;
}