To make a cylindrical cement cylinder with a bottom diameter of 0.8 meters, a wall thickness of 10 centimeters, and a height of 1.5 meters, it is used to drill wells for farmland water conservancy irrigation. What is the volume of this cement cylinder in liters?
要做一个底面直径为0.8米，壁厚10厘米，高1.5米的圆柱形水泥筒，为农田水利灌溉打水井用．求这个水泥筒的容积是多少升？
<gadget id="calculator">0.8 / 2</gadget>
<output>0.4</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">0.4 - (1/10)</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 ** 2</gadget>
<output>0.09</output>

<gadget id="calculator">3.14 * 0.09 * 1.5 * 1_000</gadget>
<output>423.9</output>

<result>423.9</result>