On the construction site, the hopper of the mixer is conical. The diameter of the mouth of the bucket is 2 meters and the depth is 1.5 meters. How much floor can be paved by laying a bucket full of concrete on a 25 cm thick floor?
建筑工地上，搅拌机的装料斗是圆锥形．斗口的直径为2米，深度为1.5米．将装满一斗的混凝土铺在25厘米厚的楼面上，能铺多大面积的楼面？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1.5 / (1/4)</gadget>
<output>6</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 6</gadget>
<output>6.28</output>

<result>6.28</result>