Alright, let's work through 1690 times 3507 step by step
1690 × 3507 = 3507 × (1690)
+ 3507 × 0 what gives us 0
+ 3507 × 90 that results in 315630
+ 3507 × 600 giving us 2104200
+ 3507 × 1000 yielding 3507000

= 5926830
