The big tank is in the center. Looks like each of the wing tanks holds about 4530 kilograms of fuel. A little less in the newer planes. So say, roughly, 4 metric tons for each wing.
Note, however, that the center tank does extend into the wings. So you need to calculate what percentage of the center tank’s fuel is in the wings.
Okay, on the Airbus, there is no center tank, and it holds 250 metric tons of fuel.
Where is this center tank that holds about 30 metric tons of fuel, if each wing only holds 4 metric tons?
Also, where are the exhaust “pipes” on these engines? I’d like to dispel the chemtrailists.