Divide a circular piece of paper with a circumference of 12.56 cm into two parts along a diameter. What is the circumference of each part in cm?
把周长为12.56厘米的圆形纸片沿着一条直径分成两部分，每部分的周长是多少厘米．
<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>