The minuend is 98, the ratio of the subtrahend to the difference is 2:5, what is the difference.
被减数是98，减数与差的比是2：5，差是多少．
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">98 * (5/7)</gadget>
<output>70</output>

<result>70</result>