There is a circular pond in Wuyang Central Primary School. Trees are planted around the circular pond, with a tree every 2.512 meters. A total of 18 trees were planted. How many square meters does this circular pond occupy?
武阳中心小学有一个圆形池塘，在一个圆形池塘周围栽树，每隔2.512米栽一棵，共栽了18棵．这个圆形池塘占地多少平方米？
<gadget id="calculator">18 / 3.14 / 2</gadget>
<output>2.866242</output>

<gadget id="calculator">2.512 * 2.866242</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 ** 2</gadget>
<output>51.84</output>

<gadget id="calculator">3.14 * 51.84</gadget>
<output>162.7776</output>

<result>162.7776</result>