The circumference of a circle is 12.56cm. Cut along the diameter to get two semicircles. What is the circumference of each semicircle in cm?
一个圆的周长是12.56cm，沿着直径剪开得到两个半圆，每个半圆的周长是多少cm．
<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>