Cut a cylinder into the largest cone. It is known that the volume of the cut part is 45 cubic centimeters. What is the volume of the original cylinder in cubic centimeters?
把一个圆柱切削成一个最大的圆锥，已知削去部分的体积是45立方厘米，原来的圆柱的体积是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">45 / (2/3)</gadget>
<output>135/2 = around 67.5</output>

<result>135/2 = around 67.5</result>