There is a bag of rice, 40% of which is eaten in the first week, and 12 kg is left to eat in the second week. How many kilograms does this bag of rice originally weigh?
有一袋米，第一周吃了40%，还剩12千克准备第二周吃．这袋米原来有多少千克．
<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">12 / (3/5)</gadget>
<output>20</output>

<result>20</result>