There is a steel cylinder with a base area of 3 square meters and a height of 6 decimeters, how many cubic decimeters of steel need to be cut off to produce a cone with the same base and height.
有一根底面积是3平方米，高6分米的圆柱体钢材，要加工成一个与它等底等高的圆锥体需要削去多少立方分米的钢材．
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</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 * (3/5) * (2/3) * 1_000</gadget>
<output>1_200</output>

<result>1_200</result>