Cut a circular piece of paper with a circumference of 18.84 cm into two semicircles. What is the circumference of the semicircle?
把周长是18.84厘米的圆纸片剪成两个半圆，半圆纸片的周长是多少．
<gadget id="calculator">18.84 / 2</gadget>
<output>9.42</output>

<gadget id="calculator">18.84 / 3.14</gadget>
<output>6</output>

<gadget id="calculator">9.42 + 6</gadget>
<output>15.42</output>

<result>15.42</result>