The divisor is 5, the quotient and remainder are both 4, what is the dividend?
除数是5，商和余数都是4，被除数是多少
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<result>24</result>