A circular flower bed has a diameter of 5 meters. Xiao Ming ran around it 5 times. How many meters did Xiao Ming run in total?
一个圆形花坛，直径是5米，小明围着它跑了5圈，小明一共跑了多少米？
<gadget id="calculator">3.14 * 5 * 5</gadget>
<output>78.5</output>

<result>78.5</result>