No problem, we've got 6454 and 7821 to multiply
6454 × 7821 = 7821 × (6454)
+ 7821 × 4 what gives us 31284
+ 7821 × 50 which equals 391050
+ 7821 × 400 resulting in 3128400
+ 7821 × 6000 resulting in 46926000

= 50476734
