When a number is divided by 23, the quotient is 18 and the remainder is 20. What is the number?
一个数除以23，商是18，余数是20，这个数是多少．
<gadget id="calculator">23 * 18</gadget>
<output>414</output>

<gadget id="calculator">414 + 20</gadget>
<output>434</output>

<result>434</result>