There is a conical steel with a base area of 4 square centimeters and a height of 7.5 meters. If the steel weighs 6.8 grams per cubic centimeter, how many kilograms does this conical steel weigh?
有一个圆锥形钢材的底面积为4平方厘米，高7.5米，如果每立方厘米钢重6.8克，这个圆锥形钢材重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6.8 / 1_000</gadget>
<output>0.0068</output>

<gadget id="calculator">(1/3) * 4 * 7.5 * 100 * 0.0068</gadget>
<output>6.8</output>

<result>6.8</result>