When Xiaogang did the multiplication calculation, he regarded one of the multipliers, 21, as 12, and the resulting product was 333 less than the correct product. What is the correct product?
小刚做乘法计算是，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333．正确的积是多少？
<gadget id="calculator">21 - 12</gadget>
<output>9</output>

<gadget id="calculator">333 / 9</gadget>
<output>37</output>

<gadget id="calculator">37 * 21</gadget>
<output>777</output>

<result>777</result>