In a subtraction formula, the difference is 12, if the minuend is divided by the subtrahend, the quotient is (7/4), what is the minuend.
在一个减法算式里，差是12，如果用被减数除以减数，商是(7/4)，被减数是多少．
<gadget id="calculator">7 - 4</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>