A rectangular playground is 150 meters long and 50 meters wide. If you run 3 laps along the playground, how many meters will you run?
一个长方形操场，长150米，宽50米，沿操场跑3圈，要跑多少米？
<gadget id="calculator">150 + 50</gadget>
<output>200</output>

<gadget id="calculator">200 * 2 * 3</gadget>
<output>1_200</output>

<result>1_200</result>