The sum of the minuend, the subtrahend and the difference is 2076, and the difference is half of the subtrahend. If the subtrahend remains unchanged and the difference increases by 42, what should the subtrahend become.
被减数、减数、差相加得2076，差是减数的一半．如果被减数不变，差增加42，减数应变为多少．
<gadget id="calculator">2_076 / 2</gadget>
<output>1_038</output>

<gadget id="calculator">1_038 - 388</gadget>
<output>650</output>

<result>650</result>