Alright, let's work through 1643 times 8076 step by step
1643 × 8076 = 8076 × (1643)
+ 8076 × 3 producing 24228
+ 8076 × 40 what gives us 323040
+ 8076 × 600 giving us 4845600
+ 8076 × 1000 resulting in 8076000

= 13268868
