A rectangular pool is 50 meters long and 36 meters wide. If you run 2 laps around the pool, how many meters will you run?
一个长方形水池，长50米，宽36米，如果围着水池跑2圈，要跑多少米？
<gadget id="calculator">50 + 36</gadget>
<output>86</output>

<gadget id="calculator">86 * 2 * 2</gadget>
<output>344</output>

<result>344</result>