There is half a tank of oil in a cuboid fuel tank, which is exactly 18 liters. Given that the bottom area of the fuel tank is 8 square decimeters, how deep is the fuel tank in decimeters?
一个长方体油箱里有半箱油，正好是18升．已知油箱底面积8平方分米，油箱深多少分米？
<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 / 8</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>