Alright, let's work through 8159 times 6266 step by step
8159 × 6266 = 6266 × (8159)
+ 6266 × 9 that results in 56394
+ 6266 × 50 yielding 313300
+ 6266 × 100 what gives us 626600
+ 6266 × 8000 that is equal 50128000

= 51124294
