conical part has a base circumference of 12.56 cm and a height of 15 cm. If steel weighs 7.8 grams per cubic centimeter, how many grams does this part weigh?
一个圆锥形零件，底面周长是12.56厘米，高15厘米，如果每立方厘米钢材重7.8克，这个零件重多少克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 15 * 7.8</gadget>
<output>489.84</output>

<result>489.84</result>