A cylinder and a cone have the same base and height. It is known that the difference between their volumes is 54 cubic centimeters. What is the sum of their volumes in cubic centimeters?
一个圆柱形和一个圆锥等底等高，已知它们的体积差是54立方厘米，那么它们的体积和是多少立方厘米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">27 * 4</gadget>
<output>108</output>

<result>108</result>