No problem, we've got 4215 and 5079 to multiply
4215 × 5079 = 5079 × (4215)
+ 5079 × 5 that results in 25395
+ 5079 × 10 which equals 50790
+ 5079 × 200 giving us 1015800
+ 5079 × 4000 what gives us 20316000

= 21407985
