Alright, let's work through 80654254 times 45180936 step by step
80654254 × 45180936 = 45180936 × (80654254)
+ 45180936 × 4 which equals 180723744
+ 45180936 × 50 producing 2259046800
+ 45180936 × 200 which equals 9036187200
+ 45180936 × 4000 resulting in 180723744000
+ 45180936 × 50000 yielding 2259046800000
+ 45180936 × 600000 giving us 27108561600000
+ 45180936 × 0000000 resulting in 0
+ 45180936 × 80000000 giving us 3614474880000000

= 3644034688101744
