The sum of the minuend, the subtrahend and the difference is 80, and the ratio of the difference to the subtrahend is 5:3. What is the difference?
被减数、减数与差的和是80，差与减数的比是5：3，差是多少．
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>