A cylinder and a cone have the same base and height, and their volumes differ by 30 cubic decimeters. What is the volume of the cylinder?
一个圆柱体和一个圆锥体等底等高，他们的体积相差30立方分米，这个圆柱的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 / (2/3)</gadget>
<output>45</output>

<result>45</result>