A steel top has a base radius of 3 cm and a height of 10 cm. The steel weighs 7.8 grams per cubic centimeter. How many grams does the top weigh?
一个钢制陀螺，它的底面半径是3cm，高是10cm，每立方厘米的钢重7.8克，这个陀螺重多少克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 10 * 7.8</gadget>
<output>734.76</output>

<result>734.76</result>