Number.prototype.round = function(n) {
	return (Math.round(this * Math.pow(10, n))) / Math.pow(10, n);
}
Number.prototype.log = function(n) {
	return Math.log(this) / Math.log(n);
}
Number.prototype.convert = function(a, b) {
	switch (a + b) {
		case "ozg":
			return this * 28.349523125;
		case "goz":
			return this / 28.349523125;
		case "incm":
			return this * 2.54;
		case "cmin":
			return this / 2.54;
		case "FC":
			return (this - 32) / 1.8;
		case "CF":
			return (this * 1.8) + 32;
		default:
			return this;
	}
}