class KgCalculate { //원형파이프 계산 함수 double roundPipeResult({ double? roundSize, double? lengthSize, // 길이라고 하자 double? thickness, double? texture, }) { double result; result = (roundSize! - thickness!) * lengthSize! * thickness * texture! * 3.14 / 1000000; return result; } double squarePipeResult({ double? widthSize, double? height..