Alright, let's work through 8105 times 5251 step by step
8105 × 5251 = 5251 × (8105)
+ 5251 × 5 which equals 26255
+ 5251 × 00 that is equal 0
+ 5251 × 100 that is equal 525100
+ 5251 × 8000 resulting in 42008000

= 42559355
