var n, r, i: integer; begin readln(n); r := 0; for i := 1 to 7 do r := r + 2*i*n; write(r) end.
var m, n, i: integer; k : real; begin readln(m,n); k := 1; for i := 0 to 10 do k := k * ((m+i)/(n+i)); write(k) end.
var
n, r, i: integer;
begin
readln(n);
r := 0;
for i := 1 to 7 do
r := r + 2*i*n;
write(r)
end.
var
m, n, i: integer;
k : real;
begin
readln(m,n);
k := 1;
for i := 0 to 10 do
k := k * ((m+i)/(n+i));
write(k)
end.