mod_n(N,15,N):-0=:=N mod 15,!.
mod_n(N,5,N):-0=:=N mod 5,!.
mod_n(N,3,N):-0=:=N mod 3,!.
mod_n(_,_,0).
calc(1000,Sum):-write(Sum).
calc(N,Sum):-mod_n(N,_,Add),Sum1 is Sum+Add,N1 is N+1,calc(N1,Sum1).
fina(_,_,F,Sum):-F>=4000000,write(Sum),!.
fina(A,B,F,Sum):-B1 is 2*A+3*B,
A1 is F,F1 is A1+2*B1,Sum1 is Sum+F,fina(A1,B1,F1,Sum1).