The circumference of the large circle is three times the circumference of the small circle, what is the ratio of the radius of the small circle to the radius of the large circle?
大圆周长是小圆周长的3倍，小圆半径与大圆半径的比值是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>