(function() {
	var pi = 3.14;
	var export;

	function circumference(radius) {
		return 2*pi*radius;
	}

	function circleArea(radius) {
		return pi*radius*radius;
	}

	export = {
		 calculateCircumference:  circumference,
		 calculateCircleArea:   circleArea
	};

	if (typeof define === 'function') {
  		define([], function () {
    		return export;
  		});
	}
})();
