A cylindrical tin oil drum has a bottom circumference of 188.4 cm and a height of 80 cm. If each liter of diesel weighs 0.8kg, how many kilograms of diesel can this barrel hold?
一个圆柱形铁皮油桶，底面周长是188.4cm，高是80cm．如果每升柴油重0.8kg，这个油桶可以装多少千克柴油？
<gadget id="calculator">188.4 / 3.14 / 2</gadget>
<output>30</output>

<gadget id="calculator">30 ** 2</gadget>
<output>900</output>

<gadget id="calculator">80 / 1_000</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">3.14 * 900 * (2/25) * 0.8</gadget>
<output>180.864</output>

<result>180.864</result>