The circumference of the large circle is 4 times the circumference of the small circle, and the diameter of the small circle is the diameter of the large circle
大圆的周长是小圆周长的4倍，小圆的直径是大圆直径多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>