The side length of a square playground is 50 meters. Xiaodong ran 3 laps along the playground. How many meters did he run in total?
一个正方形操场的边长是50米，小东沿着操场跑了3圈，共跑了多少米？
<gadget id="calculator">50 * 4 * 3</gadget>
<output>600</output>

<result>600</result>