There is a circle with a radius of 60 cm, and 10 circles of different sizes and tangent to two adjacent circles are arranged on one of its diameters. We do not know the diameters of these ten circles, and their circumferences And is how many centimeters.
有一个圆半径是60厘米，在它的一条直径上排满了10个大小不等、相邻两圆都相切的圆，我们不知道这十个圆的直径分别是多少，它们周长的和是多少厘米．
<gadget id="calculator">2 * 60</gadget>
<output>120</output>

<gadget id="calculator">3.14 * 120</gadget>
<output>376.8</output>

<result>376.8</result>