large watermelon is divided into 8 pieces on average, father eats 3 pieces, mother eats 2 pieces, how many watermelons are left uneaten.
一个大西瓜平均分成8块，爸爸吃了3块，妈妈吃了2块，还剩下多少个西瓜没有吃．
<gadget id="calculator">8 - 3 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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