Make "25*4/5" a problem and answer it.
把"25*4/5"编一道应用题并解答出来．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 * (4/5)</gadget>
<output>20</output>

<result>20</result>