如何将数字相乘，直到达到个位数并进行计数？

def multiply_until_single_digit(number):
    count = 0
    while number >= 10:
        result = 1
        while number > 0:
            result *= number % 10
            number //= 10
        number = result
        count += 1
    return count

# 示例用法
number = 12345
count = multiply_until_single_digit(number)
print("计算次数：", count)