Alright, let's work through 1639 times 3799 step by step
1639 × 3799 = 3799 × (1639)
+ 3799 × 9 giving us 34191
+ 3799 × 30 giving us 113970
+ 3799 × 600 resulting in 2279400
+ 3799 × 1000 what gives us 3799000

= 6226561
