Divide a pizza into 10 pieces on average, father ate 3 pieces, mother ate 2 pieces, Xiaoming ate 2 pieces. There is only ((())/(())) of this pizza left.
把一只比萨饼平均分成10块，爸爸吃了3块，妈妈吃了2块，小明吃了2块．还剩下这只比萨饼的((())/(()))．
<gadget id="calculator">10 - 3 - 2 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>