Alright, let's work through 2605 times 128 step by step
2605 × 128 = 128 × (2605)
+ 128 × 5 what gives us 640
+ 128 × 00 what gives us 0
+ 128 × 600 giving us 76800
+ 128 × 2000 giving us 256000

= 333440
