A bag of flour is 25 kilograms. After eating 15 kilograms, how much flour is left in the bag?
一袋面粉25千克，吃去15千克后，还剩这袋面粉的多少．
<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<gadget id="calculator">10 / 25</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>