The total length of the circumference and diameter of a circle is 248.4 cm, what is the radius of the circle?
一个圆的周长和直径的总长度是248.4厘米，这个圆的半径是多少？
<gadget id="calculator">6.28 + 2</gadget>
<output>8.28</output>

<gadget id="calculator">248.4 / 8.28</gadget>
<output>30</output>

<result>30</result>