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

const double eps = 1e-9;

int s, t;
int x, y;

double len(double a, double b) {
	return sqrt(a * a + b * b);
}

int main() {
	int x0, y0;
	scanf("%d%d%d%d%d%d", &s, &t, &x0, &y0, &x, &y);
	x -= x0;
	y -= y0;
	double deg = atan2(y, x) * 180 / M_PI;
	// cout << deg << endl;
	if (deg < 0) {
		deg = 360 + deg;
	}
	// cout << deg << endl;
	if (deg + eps < 270 && deg > 90) {
		deg -= 90;
	}
	else {
		deg = 90 - deg;
		if (deg < 0) {
			deg += 360;
		}
	}
	// cout << deg << " " << len(x, y) << endl;
	double res = deg / t + len(x, y) / s;
	if (x == 0 && y == 0) {
		cout << 0 << endl;
	}
	else {
		cout << fixed << setprecision(7) << res << endl;
	}
}