Alright, let's work through 1640 times 2063 step by step
1640 × 2063 = 2063 × (1640)
+ 2063 × 0 giving us 0
+ 2063 × 40 that is equal 82520
+ 2063 × 600 resulting in 1237800
+ 2063 × 1000 that is equal 2063000

= 3383320
