Alright, let's work through 54163178 times 75873999 step by step
54163178 × 75873999 = 75873999 × (54163178)
+ 75873999 × 8 giving us 606991992
+ 75873999 × 70 that equals 5311179930
+ 75873999 × 100 that results in 7587399900
+ 75873999 × 3000 producing 227621997000
+ 75873999 × 60000 which equals 4552439940000
+ 75873999 × 100000 giving us 7587399900000
+ 75873999 × 4000000 that results in 303495996000000
+ 75873999 × 50000000 which equals 3793699950000000

= 4109576913408822
