11 children hold hands to form a circle, the average distance between each two is 47 cm, how long is the circle?
11个小朋友手拉手拉成一个圆，平均每两人之间的距离是47厘米，这个圆一周有多长？
<gadget id="calculator">47 * 11</gadget>
<output>517</output>

<result>517</result>