Xiao Ming and Xiao Hua are standing back to back. Xiao Ming walks 173 meters to the south, and Xiao Hua walks 168 meters to the north. How far is the distance between them?
小明和小华背对背站立，小明向南走173米，小华向北走168米，两人相距多远？
<gadget id="calculator">173 + 168</gadget>
<output>341</output>

<result>341</result>