Huanhuan divides a piece of cake into 5 parts on average, and distributes 2 parts to her mother. How much of the cake does her mother eat?
欢欢把一块蛋糕平均分成5份，把其中2份分给妈妈，妈妈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>