Alright, let's work through 90268900 times 40209123 step by step
90268900 × 40209123 = 40209123 × (90268900)
+ 40209123 × 0 resulting in 0
+ 40209123 × 00 that results in 0
+ 40209123 × 900 yielding 36188210700
+ 40209123 × 8000 which equals 321672984000
+ 40209123 × 60000 resulting in 2412547380000
+ 40209123 × 200000 what gives us 8041824600000
+ 40209123 × 0000000 yielding 0
+ 40209123 × 90000000 that is equal 3618821070000000

= 3629633303174700
