n и k вводятся с клавиатуры. найти (n+k+1)!/3*n*k

Долбагб

Program prog;Uses crt;var i, k, n: integer;    f: longint;beginclrscr;write('n = ');readln(n);write('k = ');readln(k);f:=1;for i:= 2 to (n+k+1) dof:=f*i;writeln('Res = ', f/(3*n*k):0:3);end.