The diameter of the bottom of a cylinder is 8 decimeters and the height is 5 decimeters. Now it is full of gasoline, if each liter of gasoline weighs 0.8 kilograms, how many kilograms of gasoline can be contained in this barrel?
一个圆柱形汽油桶底面直径是8分米，高是5分米．现装满汽油，如果每升汽油重0.8千克，这个桶里共可装汽油多少千克？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">3.14 * 16 * 5</gadget>
<output>251.2</output>

<gadget id="calculator">251.2 * 0.8</gadget>
<output>200.96</output>

<result>200.96</result>