Xiao Ming and Xiao Li are standing back to back. Xiao Ming walks 150 meters to the north, and Xiao Li walks 120 meters to the south. How far is the distance between them?
小明和小立背对背站立，小明向北走150米，小立向南走120米，两人相距多远？
<gadget id="calculator">150 + 120</gadget>
<output>270</output>

<result>270</result>