cylindrical gasoline barrel, measured from the inside, has a bottom diameter of 8 decimeters and a height of 10 decimeters. The barrel is filled with gasoline. If gasoline weighs 0.74 kilograms per liter, how many kilograms does the gasoline barrel weigh?
一个圆柱形汽油桶，从里面量，底面直径是8分米，高是10分米，桶里装满汽油，如果每升汽油重0.74千克，这桶汽油重多少千克？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 10</gadget>
<output>502.4</output>

<gadget id="calculator">502.4 * 0.74</gadget>
<output>371.776</output>

<result>371.776</result>