Divide a piece of cake into 5 parts on average, Xiao Ming eats 2 parts, and eats as much as the cake
把一块蛋糕平均分成5份，小明吃了2份，就吃了这块蛋糕的多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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