-60 meters means 60 meters to the west of the starting point. If Xiaolin walks 280 meters westward from the starting point and then 320 meters eastward, what is the position of Xiaolin at this time.
-60米表示在起点的西边60米，如果小林从起点先向西走280米后又向东走320米，那么小林这时的位置可以表示为多少．
<gadget id="calculator">320 - 280</gadget>
<output>40</output>

<result>40</result>