На Python:

n = input()

p = 1

for i in n:

   if int(i)%2 == 0:

       p *= int(i)

print(p)

Ответ:

Python (1 var.):

n = int(input())

pr = 1

while n > 0:

   if n % 2 == 0:

       pr = pr * (n % 10)

   n = n // 10

print(pr)

Python (2 var.):

n = input()

pr = 1

for i in n:

   if int(i) % 2 == 0:

       pr = pr * int(i)

print(pr)

Pascal:

var n, pr: integer;

begin

 readln(n);

 pr := 1;

 while n > 0 do begin

   if n mod 2 = 0 then

     pr := pr * n mod 10;

   n := n div 10;

 end;

 writeln(pr);

end.