Alright, let's work through 54881982 times 15517375 step by step
54881982 × 15517375 = 15517375 × (54881982)
+ 15517375 × 2 what gives us 31034750
+ 15517375 × 80 yielding 1241390000
+ 15517375 × 900 which equals 13965637500
+ 15517375 × 1000 that results in 15517375000
+ 15517375 × 80000 yielding 1241390000000
+ 15517375 × 800000 resulting in 12413900000000
+ 15517375 × 4000000 yielding 62069500000000
+ 15517375 × 50000000 giving us 775868750000000

= 851624295437250
