When a number is divided by 12, the quotient is 3 with a remainder of 7. What is this number?
一个数除以12，商3余7，这个数是多少．
<gadget id="calculator">3 * 12</gadget>
<output>36</output>

<gadget id="calculator">36 + 7</gadget>
<output>43</output>

<result>43</result>