There used to be 400 kilograms of rice in the cafeteria, and what was eaten was the rest (2/3). How many kilograms of rice are left?
食堂原来有400千克大米，吃掉的是剩下的(2/3)．还剩多少千克大米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">400 / (5/3)</gadget>
<output>240</output>

<result>240</result>