text: /***********************************************************************
  Below we've declared a new object for a calculator that has a property
  representing the total - which is currently set to 0.
  
  Write four methods within this object named:
  1. add(num) - add the num arg to the total
  2. subtract(num) - subtract the num arg from the total
  3. divide(num) - divide the total by the num arg
  4. multiply(num) - multiply the total by the num arg
  
  Each of the above methods should return the total.
  
  Examples:
  
  calculator.add(50); // => returns 50
  calculator.subtract(35); // => returns 15
  calculator.multiply(10); // => returns 150
  calculator.divide(5); // => returns 30
  calculator.total // => returns 30
  
  ***********************************************************************/
  
  const calculator = {
    total: 0,
    add: function ( num ) {
      this.total += num;
      return this.total;
    },
    subtract: function ( num ) {
      this.total -= num;
      return this.total;
    },
    divide: function ( num ) {
      this.total /= num;
      return this.total;
    },
    multiply: function ( num ) {
      this.total *= num;
      return this.total;
    }
  };
  
  
  module.exports = calculator;
  