If a cylinder is split in half from top to bottom through the center of the bottom surface, the surface area increases by 64 square centimeters. What is the side area of the cylinder in square centimeters?
把一个圆柱体木块过底面圆心从上到下劈成两半，表面积增加64平方厘米，这个圆柱体木块的侧面积是多少平方厘米．
<gadget id="calculator">64 / 2</gadget>
<output>32</output>

<gadget id="calculator">32 * 3.14</gadget>
<output>100.48</output>

<result>100.48</result>