What is the length of the arc whose central angle is 60° to the circumference of the circle with the same radius (fill in a fraction)
圆心角为60°的弧长是与它半径相同的圆周长的多少(填几分之几)
<gadget id="calculator">60 / 360</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>