Divide a circle with a circumference of 9.42 cm into two semicircles, what is the circumference of each semicircle in cm?
把周长为9.42厘米的圆平均分成两个半圆，每个半圆的周长是多少厘米．
<gadget id="calculator">9.42 / 2</gadget>
<output>4.71</output>

<gadget id="calculator">9.42 / 3.14</gadget>
<output>3</output>

<gadget id="calculator">4.71 + 3</gadget>
<output>7.71</output>

<result>7.71</result>