Alright, let's work through 81493658 times 52472475 step by step
81493658 × 52472475 = 52472475 × (81493658)
+ 52472475 × 8 producing 419779800
+ 52472475 × 50 producing 2623623750
+ 52472475 × 600 that equals 31483485000
+ 52472475 × 3000 giving us 157417425000
+ 52472475 × 90000 that equals 4722522750000
+ 52472475 × 400000 yielding 20988990000000
+ 52472475 × 1000000 producing 52472475000000
+ 52472475 × 80000000 resulting in 4197798000000000

= 4276173932063550
