A conical steel part has a base diameter of 20 cm and a height of diameter (4/5). If each cubic centimeter of steel weighs 7.8 grams, how many grams does the part weigh?
一个圆锥体钢制零件，它的底面直径是20厘米，高是直径的(4/5)．如果每立方厘米的钢材重7.8克，这个零件有多少克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20 * (4/5)</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 100 * 16 * 7.8</gadget>
<output>13_062.4</output>

<result>13_062.4</result>