The average altitudes of places A, B, and C are 25 meters, -12 meters, and -7 meters respectively, so how many meters is the difference between the highest and the lowest.
甲乙丙三地的平均海拔高度分别是25米，-12米，-7米，那么最高的和最低的相差多少米．
<gadget id="calculator">25 - (-12)</gadget>
<output>37</output>

<result>37</result>