void main() {
    double[] tmp = readln.split.to!(double[]);
    double t = tmp[0], x = tmp[1];
    writefln("%.10f", t / x);
}

import std.stdio;
import std.string;
import std.array;
import std.conv;
import std.algorithm;
import std.range;
import std.math;
import std.container;
import std.typecons;