What is the volume of a conical steel ingot with a base diameter of 6 decimeters and a height of 5 decimeters? If each cubic decimeter weighs 3 kilograms, how many kilograms does this steel ingot weigh?
一个圆锥形钢锭，底面直径6分米，高5分米，体积多少？如果每立方分米重3千克，这个钢锭重几千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 5 * 3</gadget>
<output>141.3</output>

<result>141.3</result>