No problem, we've got 4396 and 6423 to multiply
4396 × 6423 = 6423 × (4396)
+ 6423 × 6 which equals 38538
+ 6423 × 90 which equals 578070
+ 6423 × 300 what gives us 1926900
+ 6423 × 4000 that results in 25692000

= 28235508
