Alright, let's work through 1690 times 5131 step by step
1690 × 5131 = 5131 × (1690)
+ 5131 × 0 which equals 0
+ 5131 × 90 which equals 461790
+ 5131 × 600 resulting in 3078600
+ 5131 × 1000 that equals 5131000

= 8671390
