The circumference of a full circle is 12.56cm. If it is divided into two semicircles, what is the circumference of one of the semicircles?
一个整圆的周长是12.56cm，把它分成两个半圆，其中一个半圆的周长是多少．
<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>