If a circle with a diameter of 2 cm is divided into two semicircles, what is the circumference of each semicircle in cm?
把一个直径是2cm的圆分成2个半圆后，每个半圆的周长是多少cm．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

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

<result>5.14</result>