Divide a circle with a circumference of 28.26 cm into two semicircles, what is the circumference of each semicircle in cm?
将一个周长为28.26厘米的圆平均分成两个半圆，每个半圆的周长是多少厘米．
<gadget id="calculator">28.26 / 2</gadget>
<output>14.13</output>

<gadget id="calculator">28.26 / 3.14</gadget>
<output>9</output>

<gadget id="calculator">14.13 + 9</gadget>
<output>23.13</output>

<result>23.13</result>