Cut out the largest circle from a square iron sheet with a circumference of 120 cm. What is the circumference of this circle in centimeters?
从一张周长为120cm的正方形铁皮上剪下一个最大的圆，这个圆的周长是多少厘米？
<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">3.14 * 30</gadget>
<output>94.2</output>

<result>94.2</result>