Alright, let's work through 1690 times 8088 step by step
1690 × 8088 = 8088 × (1690)
+ 8088 × 0 that equals 0
+ 8088 × 90 what gives us 727920
+ 8088 × 600 that results in 4852800
+ 8088 × 1000 resulting in 8088000

= 13668720
