In a subtraction formula, it is known that the mean of the minuend, the subtrahend, and the difference is 1.2, what is the minuend.
在一个减法算式中，已知被减数、减数、差的平均数是1.2，被减数是多少．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1.2 * (3/2)</gadget>
<output>1.8</output>

<result>1.8</result>