using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace NUnitTest1 {
    public class Arithmetic {
        private decimal total;

        public void StartWith(decimal number) {
            total = number;     }

        public void Add(decimal number) {
            total += number;    }

        public void Minus(decimal number) {
            total -= number;    }

        public void Multiply(decimal number) {
            total *= number;    }

        public void Divide(decimal number) {
            total /= number;    }

        public void Mod(decimal number) {
            total %= number;    }

        public decimal Total {
            get { return total; } 
        }
    }
}