Alright, let's work through 2839 times 3742 step by step
2839 × 3742 = 3742 × (2839)
+ 3742 × 9 what gives us 33678
+ 3742 × 30 which equals 112260
+ 3742 × 800 that results in 2993600
+ 3742 × 2000 which equals 7484000

= 10623538
