There is a cylinder whose lateral area is 37.68dm**2, if its height is 3dm, what is its bottom area dm**2.
有一个圆柱体的侧面积是37.68dm**2，若高3dm，它的底面积是多少dm**2．
<gadget id="calculator">37.68 / 3 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>