A bag of flour, eat 15 kilograms, exactly (3/4) of this bag of flour, how many kilograms of this bag of flour is left?
一袋面粉，吃了15千克，正好是这袋面粉的(3/4)，这袋面粉还剩多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / (3/4)</gadget>
<output>20</output>

<gadget id="calculator">20 - 15</gadget>
<output>5</output>

<result>5</result>