No problem, we've got 5409 and 2156 to multiply
5409 × 2156 = 2156 × (5409)
+ 2156 × 9 what gives us 19404
+ 2156 × 00 resulting in 0
+ 2156 × 400 producing 862400
+ 2156 × 5000 yielding 10780000

= 11661804
