A cuboid fuel tank measures 6 decimeters in length, 5 decimeters in width, and 4 decimeters in height. If a certain type of gasoline costs 7.5 yuan per liter, how much does it cost to fill up the fuel tank?
一个长方体油箱，从里面量长是6分米，宽5分米，高4分米，如果某种型号的汽油7.5元一升，加满这个油箱需要多少元？
<gadget id="calculator">6 * 5 * 4</gadget>
<output>120</output>

<gadget id="calculator">7.5 * 120</gadget>
<output>900</output>

<result>900</result>