If a cylindrical billet is cut into the largest cone, 2.7 cubic centimeters should be cut off. What is the volume of the cylinder before cutting.
把一个圆柱体钢坯削成一个最大的圆锥体，要削去2.7立方厘米，未削前圆柱的体积是多少立方厘米．
<result>1.8</result>