A bag of rice is eaten (2/5), and there are 18 kilograms left. How many kilograms does this bag of rice have?
一袋米，吃了(2/5)，还剩18千克，这袋米原有多少千克．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">18 / (3/5)</gadget>
<output>30</output>

<result>30</result>