A conical part has a base radius of 4 cm and a height of 6 cm. Each cubic centimeter of iron weighs 7.8 grams. How many grams does this part weigh?
一个圆锥形零件，底面半径是4厘米，高是6厘米，每立方厘米的铁块重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">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 6 * 7.8</gadget>
<output>783.744</output>

<result>783.744</result>