Divide a circle with a circumference of 25.12 cm into two semicircles, what is the circumference of each semicircle in cm?
把周长为25.12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">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">25.12 / 3.14</gadget>
<output>8</output>

<gadget id="calculator">12.56 + 8</gadget>
<output>20.56</output>

<result>20.56</result>