When Honghong was doing the multiplication problem, she regarded one of the multipliers, 21, as 12. The resulting product was 117 less than the correct product. What is the correct product?
红红做乘法计算题时，把其中一个乘数21看成了12，结果得到的积比正确的积少了117，正确的积是多少？
<gadget id="calculator">21 - 12</gadget>
<output>9</output>

<gadget id="calculator">117 / 9</gadget>
<output>13</output>

<gadget id="calculator">13 * 21</gadget>
<output>273</output>

<result>273</result>