Alright, let's work through 1387 times 8410 step by step
1387 × 8410 = 8410 × (1387)
+ 8410 × 7 giving us 58870
+ 8410 × 80 that equals 672800
+ 8410 × 300 that results in 2523000
+ 8410 × 1000 giving us 8410000

= 11664670
