Xiao Ming and Xiao Hua stand back to back, Xiao Ming walks 150 meters to the north, and Xiao Hua walks 120 meters to the south, how many meters are there between them?
小明和小华背对背站立，小明向北走150米，小华向南走120米，两人相距多少米．
<gadget id="calculator">150 + 120</gadget>
<output>270</output>

<result>270</result>