Divide a piece of chocolate into 5 parts on average, Xiaohong ate 2 parts, and Xiaohong ate ((())/(())) of this piece of chocolate.
把一块巧克力平均分成5分，小红吃了2份，小红吃了这块巧克力的((())/(()))．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>