There are 200 kilograms in a bag of rice, and the rest (1/4) is used. How many kilograms are used?
一袋大米有200千克，用去的是剩下的(1/4)，用去多少千克？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">200 / (5/4)</gadget>
<output>160</output>

<gadget id="calculator">200 - 160</gadget>
<output>40</output>

<result>40</result>