A cylindrical steel bar with a base diameter of 6 cm and a height of 8 cm. It should be cut into a conical part with the same height as its base. How many cm to cut off the steel**3.
一个圆柱形钢材，底面直径6cm，高8cm．要把它削成与它同底等高的圆锥形零件．要削去钢材多少cm**3．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<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">3.14 * 9 * 8 * (2/3)</gadget>
<output>150.72</output>

<result>150.72</result>