Add 7 to a number, multiply by 3, and subtract 15 to get the largest three-digit number. then how much is this number
一个数加上7，乘以3，减去15，得到最大的三位数．则这个数是多少
<gadget id="calculator">999 + 15</gadget>
<output>1_014</output>

<gadget id="calculator">1_014 / 3</gadget>
<output>338</output>

<gadget id="calculator">338 - 7</gadget>
<output>331</output>

<result>331</result>