In a subtraction formula, the sum of the minuend, the subtrahend, and the difference is 10, and the difference is 3.2, so what is the subtrahend
在一道减法算式中，被减数、减数、差的和是10，其中差是3.2，那么减数是多少
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 - 3.2</gadget>
<output>1.8</output>

<result>1.8</result>