Alright, let's work through 1645 times 1833 step by step
1645 × 1833 = 1833 × (1645)
+ 1833 × 5 that results in 9165
+ 1833 × 40 what gives us 73320
+ 1833 × 600 what gives us 1099800
+ 1833 × 1000 resulting in 1833000

= 3015285
