下面是一个基于Python的大数计算器的示例代码：

class BigNumberCalculator:def __init__(self, num1, num2):self.num1 = num1self.num2 = num2@staticmethoddef add(num1, num2):result = ''carry = 0len1, len2 = len(num1), len(num2)max_len = max(len1, len2)for i in range(max_len):digit1 = int(num1[len1 - 1 - i]) if i < len1 else 0digit2 = int(num2[len2 - 1 - i]) if i < len2 else 0temp_sum = digit1 + digit2 + carrycarry = temp_sum // 10digit_sum = temp_sum % 10result = str(digit_sum) + resultif carry > 0:result = str(carry) + resultreturn result@staticmethoddef multiply(num1, num2):result = ''len1, len2 = len(num1), len(num2)product = [0] * (len1 + len2)for i in range(len1-1, -1, -1):for j in range(len2-1, -1, -1):digit1 = int(num1[i])digit2 = int(num2[j])temp_product = digit1 * digit2 + product[i+j+1]product[i+j+1] = temp_product % 10product[i+j] += temp_product // 10for digit in product:result += str(digit)result = result.lstrip('0')if not result:result = '0'return result# 使用示例
num1 = '12345678901234567890'
num2 = '98765432109876543210'calculator = BigNumberCalculator(num1, num2)add_result = calculator.add(num1, num2)
print(f'Addition: {num1} + {num2} = {add_result}')multiply_result = calculator.multiply(num1, num2)
print(f'Multiplication: {num1} x {num2} = {multiply_result}')

这个示例代码定义了一个名为BigNumberCalculator的类，其中包含了两个静态方法add和multiply。add方法用于实现大数相加，multiply方法用于实现大数相乘。

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