Mom divides a watermelon into 8 parts on average, of which father eats 1 part, mother eats 1 part, naughty eats 2 parts, how much of the watermelon is left
妈妈把一个西瓜平均分成8份，其中爸爸吃了1份，妈妈吃了1份，淘气吃了2份，这时剩下这个西瓜的多少
<gadget id="calculator">8 - 1 - 1 - 2</gadget>
<output>4</output>

<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>