There is a batch of rice in the cafeteria. After eating 100 kilograms of rice, there is still (1/5) of this batch of rice. How many kilograms of this batch of rice are there?
食堂有一批大米，吃了100千克大米后，还剩下这批大米的(1/5)，这批大米共多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 / (4/5)</gadget>
<output>125</output>

<result>125</result>