The difference between the volume of a cylinder and a cone with the same base and height is 84 cubic centimeters. What is the volume of the cylinder?
一个圆柱与和它等底等高的圆锥的体积之差是84立方厘米，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">84 / (2/3)</gadget>
<output>126</output>

<result>126</result>