The surface area of a cylinder is 153m**2, and the side area is 95m**2, what is the area of its base in m**2?
一个圆柱体的表面积是153m**2，侧面积是95m**2，它的一个底面积是多少m**2．
<gadget id="calculator">153 - 95</gadget>
<output>58</output>

<gadget id="calculator">58 / 2</gadget>
<output>29</output>

<result>29</result>