Alright, let's work through 87984391 times 55149507 step by step
87984391 × 55149507 = 55149507 × (87984391)
+ 55149507 × 1 that equals 55149507
+ 55149507 × 90 producing 4963455630
+ 55149507 × 300 resulting in 16544852100
+ 55149507 × 4000 which equals 220598028000
+ 55149507 × 80000 resulting in 4411960560000
+ 55149507 × 900000 which equals 49634556300000
+ 55149507 × 7000000 what gives us 386046549000000
+ 55149507 × 80000000 which equals 4411960560000000

= 4852295787345237
