Alright, let's work through 1688 times 7491 step by step
1688 × 7491 = 7491 × (1688)
+ 7491 × 8 resulting in 59928
+ 7491 × 80 that equals 599280
+ 7491 × 600 that equals 4494600
+ 7491 × 1000 what gives us 7491000

= 12644808
