rectangular park is 200 meters long and 100 meters wide. If you run 3 laps in the park every day, how many meters do you run every day?
一个长方形的公园长有200米，宽有100米，如果每天饶公园跑3圈，每天跑多少米？
<gadget id="calculator">200 + 100</gadget>
<output>300</output>

<gadget id="calculator">300 * 2 * 3</gadget>
<output>1_800</output>

<result>1_800</result>