Country A and B each have 1000 units of labour. In Country A, one unit of labour can produce 10 computers or 30 kilograms of cheese. Country B can use one unit of labour to produce 14 kilograms of cheese or 16 computers. Suppose Country A follows its comparative advantage in deciding what to produce and trades with Country B at a trade price of 0.8 computer per kilogram of cheese, and Country A consumes 18000 kilograms of cheese at home, then Country A's gain from trade would be _____________computers.