The position of a shark can be represented by -100 meters, and a submarine is 25 meters above it, how many meters is the position of the submarine.
一条鲨鱼所在位置可以用-100米表示，一艘潜水艇在它的上方25米处，潜水艇所在位置是多少米．
<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<result>75</result>