Xiaohua measured the circumference of a tree trunk to be 75.36 centimeters, and the approximate cross-section of this tree trunk is how many square centimeters.
小华量得一根树干的周长是75.36厘米，这根树干的横截面大约是多少平方厘米．
<gadget id="calculator">75.36 / 3.14 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">3.14 * 144</gadget>
<output>452.16</output>

<result>452.16</result>