In a subtraction formula, the ratio of the subtrahend to the difference is 2:3, the subtrahend is 2.4 less than the difference, what is the minuend.
一个减法算式，减数和差的比是2：3，减数比差少2.4，被减数是多少．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2.4 / (1/5)</gadget>
<output>12</output>

<result>12</result>