Alright, let's work through 1645 times 5382 step by step
1645 × 5382 = 5382 × (1645)
+ 5382 × 5 what gives us 26910
+ 5382 × 40 what gives us 215280
+ 5382 × 600 giving us 3229200
+ 5382 × 1000 that is equal 5382000

= 8853390
