A wire with a length of 3.14 decimeters is made into the largest circle, what is the radius of the circle in decimeters?
把一根长为3.14分米的铁丝做成一个最大的圆，圆的半径为多少分米．
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<result>0.5</result>