Xiaohong and Xiaoli take the big tree as the starting point. Xiaohong walks 10 meters to the east, which is recorded as +10 meters, and Xiaoli walks 8 meters to the west, which is recorded as -8 meters. How many meters is the distance between Xiaohong and Xiaoli?
小红和小丽以大树为起点，小红向东走10米记作+10米，小丽向西走8米记作-8米，小红和小丽相距多少米米．
<gadget id="calculator">10 + 8</gadget>
<output>18</output>

<result>18</result>