A rope is 10.28 meters long. If it forms a semicircle, what is the radius of the semicircle?
一根绳子长10.28米，如果围成一个半圆形，这个半圆的半径是多少米？
<gadget id="calculator">10.28 / 5.14</gadget>
<output>2</output>

<result>2</result>