A cylinder and a cone have the same base and height, the sum of their volumes is 60 cubic centimeters, what is the difference in volume in cubic centimetres?
一个圆柱与一个圆锥等底等高，它们的体积之和为60立方厘米，体积之差是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 / (4/3)</gadget>
<output>45</output>

<gadget id="calculator">45 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">45 - 15</gadget>
<output>30</output>

<result>30</result>