A rectangular cell has a length of 1000 meters and a width of 500 meters. Grandpa Li walked 2 times around the community, how many kilometers in total.
一个长方形小区的长是1000米，宽是500米．李爷爷绕着这个小区走了2圈，一共走了多少千米．
<gadget id="calculator">1_000 + 500</gadget>
<output>1_500</output>

<gadget id="calculator">2 / 1_000</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">1_500 * 2 * (1/500)</gadget>
<output>6</output>

<result>6</result>