The circumference of a circle is 18.84 centimeters, so how many decimeters is the circumference of a semicircle?
圆的周长是18.84厘米，那么半圆的周长是多少分米．
<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>