In the spring of 2010, five provinces in Southwest China faced a severe drought of the century, and 20 million compatriots faced no water to drink. All walks of life have extended a helping hand to help them tide over the difficulties. Among them, some organizations dug "love wells" for them. How many cubic meters of soil do they need to dig a cylindrical "love well" with a depth of 100 meters and a diameter of 1.6 meters?
2010年春季，西南5省面临世纪大旱，2000万同胞面临无水可饮．社会各界纷纷伸出援手，帮助他们渡过难关．其中，有些机构为他们挖"爱心井"，挖一个深100米，直径1.6米的圆柱形状的"爱心井"，需要挖土多少立方米？
<gadget id="calculator">1.6 / 2</gadget>
<output>0.8</output>

<gadget id="calculator">0.8 ** 2</gadget>
<output>0.64</output>

<gadget id="calculator">3.14 * 0.64 * 100</gadget>
<output>200.96</output>

<result>200.96</result>