Alright, let's work through 1587 times 8078 step by step
1587 × 8078 = 8078 × (1587)
+ 8078 × 7 which equals 56546
+ 8078 × 80 resulting in 646240
+ 8078 × 500 which equals 4039000
+ 8078 × 1000 resulting in 8078000

= 12819786
