从键盘输入一个4位十进制正整数A和一个2位十进制正整数B。若B为素数，则在屏幕上以十进制输出它们相乘的积，以及A÷B的商和余数-Keyboard input a 4 bit decimal integer A and a 2 bit decimal integer B. If B is a prime number, is on the screen in decimal multiplication output their product, and A/B quotient and rem