A steel piece has a cone on the top and a cylinder with the same base on the bottom. It is known that the circumference of the bottom of the steel piece is 18.84cm, the total height is 15cm, and the ratio of the height of the cylinder to the height of the cone is 2:3. If each cubic centimeter The steel weighs 7.8kg, what is the total mass of this steel piece in kilograms?
一个钢件，上面是圆锥，下面是等底的圆柱，已知钢件的底面周长是18.84cm，总高是15cm，圆柱的高和圆锥的高的比是2：3，如果每立方厘米的钢重7.8kg，这个钢件的总质量是多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 * (2/5)</gadget>
<output>6</output>

<gadget id="calculator">(1/3) * 28.26 * 6</gadget>
<output>56.52</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 * (3/5)</gadget>
<output>9</output>

<gadget id="calculator">28.26 * 9</gadget>
<output>254.34</output>

<gadget id="calculator">56.52 + 254.34</gadget>
<output>310.86</output>

<gadget id="calculator">7.8 * 310.86</gadget>
<output>2_424.708</output>

<result>2_424.708</result>