A pool has been filled with (5/8) pool of water, how much water will be filled to fill it.
一个水池已经灌满了(5/8)池的水，还要灌多少水才满．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>