A bag of flour, after eating (3/5), there are 40 kilograms left, how many kilograms is the original bag of flour?
一袋面粉，吃了它的(3/5)，还剩40千克，这袋面粉原有多少千克．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 / (2/5)</gadget>
<output>100</output>

<result>100</result>