Alright, let's work through 90054762 times 72671409 step by step
90054762 × 72671409 = 72671409 × (90054762)
+ 72671409 × 2 which equals 145342818
+ 72671409 × 60 that equals 4360284540
+ 72671409 × 700 that results in 50869986300
+ 72671409 × 4000 that equals 290685636000
+ 72671409 × 50000 what gives us 3633570450000
+ 72671409 × 000000 producing 0
+ 72671409 × 0000000 yielding 0
+ 72671409 × 90000000 what gives us 6540426810000000

= 6544406441699658
