When a number is divided by 15, the quotient is 16 and the remainder is 7. What is the number?
一个数除以15，商是16，余数是7，这个数是多少．
<gadget id="calculator">15 * 16</gadget>
<output>240</output>

<gadget id="calculator">240 + 7</gadget>
<output>247</output>

<result>247</result>