Cut a cylinder into the largest cone, the volume of the cut part is 30cm**3, what is the volume of the original cylinder in cm**3.
把一个圆柱削成一个最大的圆锥，削去部分的体积是30cm**3，原来圆柱的体积是多少cm**3．
<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>