The circumference of the base of a cylinder is 6.28 centimeters, and after the height is increased by 2 centimeters, the lateral area is 43.96 square centimeters. What is the volume of the cylinder in cubic centimeters?
一个圆柱的底面周长是6.28厘米，高增加2厘米后，侧面积是43.96平方厘米．圆柱的体积是多少立方厘米？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">43.96 / 6.28</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 1 * 7</gadget>
<output>21.98</output>

<result>21.98</result>