Divide a circle with a circumference of 6.28 cm into two equal parts to form two semicircles. What is the circumference of each semicircle?
把周长是6.28厘米的圆平均分成两份，成为两个半圆，每个半圆的周长是多少．
<gadget id="calculator">6.28 / 3.14</gadget>
<output>2</output>

<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 + 2</gadget>
<output>5.14</output>

<result>5.14</result>