A bag of flour eats 12 kilograms, accounting for 75% of the total. How many kilograms of flour are left in this bag?
一袋面粉，吃了12千克，占总量的75%，这袋面粉还剩多少千克？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">12 / (3/4)</gadget>
<output>16</output>

<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<result>4</result>