Alright, let's work through 55173987 times 21056493 step by step
55173987 × 21056493 = 21056493 × (55173987)
+ 21056493 × 7 producing 147395451
+ 21056493 × 80 that equals 1684519440
+ 21056493 × 900 that results in 18950843700
+ 21056493 × 3000 what gives us 63169479000
+ 21056493 × 70000 yielding 1473954510000
+ 21056493 × 100000 that is equal 2105649300000
+ 21056493 × 5000000 resulting in 105282465000000
+ 21056493 × 50000000 resulting in 1052824650000000

= 1161770671047591
