After 40% of a bag of rice is used, the remaining 5 kg is more than what was used. How many kg does the bag of rice originally weigh? (in two ways)
一袋大米，用去40%后，剩下的比用去的多5千克，这袋大米原来有多少千克？(用两种方法)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / (1/5)</gadget>
<output>25</output>

<result>25</result>