One factor is 28, and the other factor is 3 times 28 less 12, what is the product of these two factors?
一个因数是28，另一个因数是28的3倍少12，则这两个因数的积是多少．
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">84 - 12</gadget>
<output>72</output>

<gadget id="calculator">72 * 28</gadget>
<output>2_016</output>

<result>2_016</result>