Divide a circle with a circumference of 12.56 cm into two semicircles, what is the circumference of each semicircle in cm?
把周长为12.56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">12.56 / 2</gadget>
<output>6.28</output>

<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<gadget id="calculator">6.28 + 4</gadget>
<output>10.28</output>

<result>10.28</result>