"""Calculator for DB"""

class CalculatorDB:
    def __init__(self):
        self.history = []

    def add(self, num1, num2):
        result = num1 + num2
        self.log_operation(f"Addition: {num1} + {num2} = {result}")
        return result

    def subtract(self, num1, num2):
        result = num1 - num2
        self.log_operation(f"Subtraction: {num1} - {num2} = {result}")
        return result

    def multiply(self, num1, num2):
        result = num1 * num2
        self.log_operation(f"Multiplication: {num1} * {num2} =