Alright, let's work through 2142 times 8470 step by step
2142 × 8470 = 8470 × (2142)
+ 8470 × 2 which equals 16940
+ 8470 × 40 giving us 338800
+ 8470 × 100 resulting in 847000
+ 8470 × 2000 what gives us 16940000

= 18142740
