The diameter of the small circle is 3 cm, the radius of the large circle is 3 cm, what is the circumference of the small circle equal to the circumference of the large circle
小圆的直径是3厘米，大圆的半径是3厘米，小圆周长是大圆周长的多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>