A square square has a side length of 150 meters. Wang Dong runs around the square every day. How many meters does Wang Dong run every day?
一个正方形的广场，边长是150米，王东每天沿着广场跑一圈，王东每天跑多少米．
<gadget id="calculator">150 * 4</gadget>
<output>600</output>

<result>600</result>