text: module.exports.function = function arithmeticOperation (leftOperand, rightOperand, operator) {
    var result = 0;
    var name = '';
    
    operator = String(operator);
    
    if(operator === "plus"){
      name = "더하기";
      result = leftOperand + rightOperand;
    }else if(operator === "subtract"){
      name = "빼기";
      result = leftOperand - rightOperand;
    }else if(operator === "multiplication"){
      name = "곱하기";
      result = leftOperand * rightOperand;
    }else if(operator === "division"){
      name = "나누기";
      result = leftOperand / rightOperand;
    }
    
    
    return {
      operator: name,
      result: result
    };
  }
  