The volume difference between a cylinder and a cone with the same base and height is 15.7 cubic centimeters. What is the volume of the cylinder in cubic centimeters?
等底等高的圆柱和圆锥体积相差15.7立方厘米，圆柱的体积是多少立方厘米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">15.7 / 2</gadget>
<output>7.85</output>

<gadget id="calculator">7.85 * 3</gadget>
<output>23.55</output>

<result>23.55</result>