Xiaohong and Xiaoming are standing back to back. Xiaohong walks 120 meters to the north, and Xiaoming walks 180 meters to the south. How far is the distance between them?
小红和小明背对背站立，小红向北走120米，小明向南走180米，两人相距多远？
<gadget id="calculator">120 + 180</gadget>
<output>300</output>

<result>300</result>