In a subtraction formula, the sum of the minuend, the subtrahend, and the difference equals 400. What is the minuend?
在一道减法算式里，被减数、减数、差三个数相加等于400，被减数是多少．
<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<result>200</result>