It is known that the minuend, the sum of the subtrahend and the difference between three numbers is 612, do you know what the minuend is?
已知被减数，减数和差三个数的和是612，你知道被减数是多少吗？
<gadget id="calculator">612 / 2</gadget>
<output>306</output>

<result>306</result>