Alright, let's work through 3694 times 3521 step by step
3694 × 3521 = 3521 × (3694)
+ 3521 × 4 that equals 14084
+ 3521 × 90 giving us 316890
+ 3521 × 600 giving us 2112600
+ 3521 × 3000 which equals 10563000

= 13006574
