There is a bag of rice, 40% of which was eaten in the first week, and 24 kg in the second week, and there are 6 kg left. How much does this bag of rice weigh?
有一袋大米，第一周吃了40%，第二周吃了24千克，还剩6千克，这袋大米原来有多重？
<gadget id="calculator">24 + 6</gadget>
<output>30</output>

<gadget id="calculator">40 / 100</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">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>