The circumference of the base of a cylinder is (2/3) that of the base of a cone, and the ratio of their heights is 2:5. Given that the volume of the cone is 450 cubic centimeters, find the volume of the cylinder.
一个圆柱体底面周长是一个圆锥体底面周长的(2/3)，而它们的高之比是2：5．已知圆锥的体积是450立方厘米，求圆柱的体积．
<gadget id="calculator">450 / 15</gadget>
<output>30</output>

<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<result>240</result>