The side area of a cylinder is 37.68dm**2, the height is 3dm, what is the radius of its bottom in dm.
一个圆柱的侧面积是37.68dm**2，高是3dm，它的底面半径是多少dm．
<gadget id="calculator">37.68 / 3</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>