If a cylinder is cut into the largest cone, the cut volume is 30 cubic decimeters. What is the original volume of the cylinder?
把一个圆柱削成一个最大的圆锥，削去的体积是30立方分米，原来这个圆柱的体积是多少立方分米．
<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>