Alright, let's work through 90609137 times 55631017 step by step
90609137 × 55631017 = 55631017 × (90609137)
+ 55631017 × 7 which equals 389417119
+ 55631017 × 30 that equals 1668930510
+ 55631017 × 100 which equals 5563101700
+ 55631017 × 9000 resulting in 500679153000
+ 55631017 × 00000 yielding 0
+ 55631017 × 600000 which equals 33378610200000
+ 55631017 × 0000000 what gives us 0
+ 55631017 × 90000000 that is equal 5006791530000000

= 5040678440802329
