Uncle Wang's orchard is 800 meters long and 500 meters wide. If a fence is built around the orchard, how long is the fence?
王伯伯的果园长800米，宽500米，如果给果园四周围上篱笆，篱笆长多少米？
<gadget id="calculator">800 + 500</gadget>
<output>1_300</output>

<gadget id="calculator">1_300 * 2</gadget>
<output>2_600</output>

<result>2_600</result>