Alright, let's work through 2634 times 1640 step by step
2634 × 1640 = 1640 × (2634)
+ 1640 × 4 that results in 6560
+ 1640 × 30 which equals 49200
+ 1640 × 600 that equals 984000
+ 1640 × 2000 giving us 3280000

= 4319760
