If the sum of the volumes of a cone and a cylinder with the same base and height is 120 cubic centimeters, what is the difference between their volumes in cubic centimeters?
等底等高的圆锥和圆柱的体积之和是120立方厘米，则它们的体积之差是多少立方厘米．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">90 - 30</gadget>
<output>60</output>

<result>60</result>