There is a circular flower bed with a radius of 50 meters. Uncle Wang runs around the flower bed 4 times every morning. How many meters does he run every morning?
有一个圆形花坛，半径是50米，王叔叔每天早晨绕花坛跑4圈，他每天早晨跑多少米？
<gadget id="calculator">2 * 3.14 * 50 * 4</gadget>
<output>1_256</output>

<result>1_256</result>