Alright, let's work through 81355283 times 48455579 step by step
81355283 × 48455579 = 48455579 × (81355283)
+ 48455579 × 3 that is equal 145366737
+ 48455579 × 80 producing 3876446320
+ 48455579 × 200 yielding 9691115800
+ 48455579 × 5000 what gives us 242277895000
+ 48455579 × 50000 resulting in 2422778950000
+ 48455579 × 300000 yielding 14536673700000
+ 48455579 × 1000000 yielding 48455579000000
+ 48455579 × 80000000 producing 3876446320000000

= 3942117342473857
