There is a rectangular playground in Hongxing Primary School, which is 90 meters long and 60 meters wide. How many meters does it take to run around the playground?
红星小学有一个长方形操场，长90米，宽60米，沿操场跑一圈，要跑多少米？
<gadget id="calculator">90 + 60</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<result>300</result>