can someone explain these magic numbers in worldgen?

[davidromrell]

Description

public double sample(double x, double y, double z) {
    double d = x * 1.0181268882175227;
    double e = y * 1.0181268882175227;
    double f = z * 1.0181268882175227;
    return (this.firstSampler.sample(x, y, z) + this.secondSampler.sample(d, e, f)) * this.amplitude;
}