A cuboid fuel tank, measured from the inside, has a bottom 2 decimeters square and a height 5 decimeters. If gasoline weighs 0.68 kilograms per liter, how many kilograms of gasoline can this tank hold?
一种长方体油箱，从里面量，底面是边长2分米的正方形，高5分米．如果每升汽油重0.68千克，这个油箱最多可装汽油多少千克？
<gadget id="calculator">2 * 2 * 5</gadget>
<output>20</output>

<gadget id="calculator">0.68 * 20</gadget>
<output>13.6</output>

<result>13.6</result>