Alright, let's work through 55458390 times 73751013 step by step
55458390 × 73751013 = 73751013 × (55458390)
+ 73751013 × 0 resulting in 0
+ 73751013 × 90 resulting in 6637591170
+ 73751013 × 300 resulting in 22125303900
+ 73751013 × 8000 that is equal 590008104000
+ 73751013 × 50000 yielding 3687550650000
+ 73751013 × 400000 producing 29500405200000
+ 73751013 × 5000000 producing 368755065000000
+ 73751013 × 50000000 what gives us 3687550650000000

= 4090112441849070
