Divide 4kg of rice into 5 parts on average, of which 2 parts account for the amount of 4kg of rice.
把4kg大米平均分成5份，其中2份占4kg大米的多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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