The volume of a cylindrical gasoline barrel is 90 cubic decimeters, and the bottom area is 15 cubic decimeters. Now the barrel contains (5/12) gasoline, how many decimeters is the oil level high?
一圆柱形汽油桶的容积是90立方分米，底面积是15立方分米，现桶内装有(5/12)的汽油，油面高多少分米？
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">90 / 15</gadget>
<output>6</output>

<gadget id="calculator">90 * (5/12) * 6</gadget>
<output>225</output>

<gadget id="calculator">225 / 90</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>