A large watermelon is divided into 8 pieces on average, and 3 pieces are eaten, how much of the watermelon is left.
一个大西瓜平均分成8块，吃掉了3块，还剩这个西瓜的多少．
<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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