The sum of the minuend, the subtrahend and the difference is 200, and the ratio of the difference to the subtrahend is 2:3. What is the difference?
被减数、减数与差的和是200，差与减数的比是2：3，差是多少．
<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>