There is a cone-shaped pile of sand, the radius of the bottom is 6 decimeters, and the height is 4.5 decimeters. If the sand is spread on a channel with a length of 6.28 decimeters and a width of 3 decimeters, how many meters is the thickness of the sand? (The value of π is 3.14)
有一堆圆锥形沙子，底面半径是6分米，高是4.5分米，把沙子铺在长是6.28分米，宽是3分米的通道上，沙子厚多少米？(π值取3.14)
<gadget id="calculator">169.56 / 18.84</gadget>
<output>9</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>