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#1 Created at ... [Delete] [Delete and Lock User]

a1 =  input('请输入第一个数:')
print('第一个数：' + a1)
a2 =  input('请输入第二个数:')
print('第二个数：' + a2)
print(a1 ,'*' , a2 , '=',  (float(a1) * float(a2)))

#2 Created at ... [Delete] [Delete and Lock User]

请问变量不需要声明类型？计算的时候又需要强制转换才不报错不是太明白

#3 Created at ... [Delete] [Delete and Lock User]

通过input()函数输入的a1,a2是str类型的

#4 Created at ... [Delete] [Delete and Lock User]

怎么才能使得A1和a2的值相乘呢？