Divide a watermelon into 8 parts on average, eat 3 parts, and there is still ((())/(())).
把一个西瓜平均分成8份，吃了3份，还剩((())/(()))．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>