Alright, let's work through 54814975 times 81624423 step by step
54814975 × 81624423 = 81624423 × (54814975)
+ 81624423 × 5 what gives us 408122115
+ 81624423 × 70 producing 5713709610
+ 81624423 × 900 giving us 73461980700
+ 81624423 × 4000 yielding 326497692000
+ 81624423 × 10000 that results in 816244230000
+ 81624423 × 800000 that equals 65299538400000
+ 81624423 × 4000000 which equals 326497692000000
+ 81624423 × 50000000 that equals 4081221150000000

= 4474240706134425
