When a number is divided by 23, the quotient is 38 and the remainder is 7. What is the number?
一个数除以23，商是38，余数是7，这个数是多少．
<gadget id="calculator">23 * 38</gadget>
<output>874</output>

<gadget id="calculator">874 + 7</gadget>
<output>881</output>

<result>881</result>