If a number is divided by 5, the quotient is 80 and the remainder is 3. What is this number?
一个数除以5，商80余3，这个数是多少．
<gadget id="calculator">80 * 5</gadget>
<output>400</output>

<gadget id="calculator">400 + 3</gadget>
<output>403</output>

<result>403</result>