A cone of sand has a bottom area of 45 square meters and a height of 1.2m. Use this pile of sand to lay a 3cm-thick roadbed on a road with a width of 12m. How many meters can be paved?
一个圆锥沙堆，底面积是45㎡，高是1.2m．用这堆沙在宽12m的路面上铺3cm厚的路基，能铺多少米长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">12 * (3/100)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">(1/3) / (9/25)</gadget>
<output>25/27 = around 0.925926</output>

<gadget id="calculator">45 * 1.2 * (25/27)</gadget>
<output>50</output>

<result>50</result>