Alright, let's work through 8143 times 9105 step by step
8143 × 9105 = 9105 × (8143)
+ 9105 × 3 that is equal 27315
+ 9105 × 40 that equals 364200
+ 9105 × 100 which equals 910500
+ 9105 × 8000 that equals 72840000

= 74142015
