The volume of a cone is 45cm**3 smaller than the volume of a cylinder with the same height and base. What is the volume of the cone in cm**3?
一个圆锥的体积比和它等高等底的圆柱的体积小45cm**3，这个圆锥的体积是多少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">45 / (2/3)</gadget>
<output>135/2 = around 67.5</output>

<gadget id="calculator">(135/2) * (1/3)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>