Xiao Ming travels 10 meters eastward from 0 o'clock, which is recorded as +10 meters, then he travels 20 meters westward from the position of -25 meters, and his position at this time is recorded as how many meters.
小明从0点向东行10米，记作+10米，那么他从-25米的位置向西再行20米，这时他的位置记作多少米．
<gadget id="calculator">25 + 20</gadget>
<output>45</output>

<result>45</result>