The woodpecker caught 28 worms, and the chicken caught 43 worms. Ask how many fewer worms the woodpecker caught than the chicken.
啄木鸟捉了28条虫子，小鸡捉了43条虫子，问啄木鸟比小鸡少捉了多少条虫子．
<gadget id="calculator">43 - 28</gadget>
<output>15</output>

<result>15</result>