Alright, let's work through 4182 times 645 step by step
4182 × 645 = 645 × (4182)
+ 645 × 2 what gives us 1290
+ 645 × 80 that equals 51600
+ 645 × 100 giving us 64500
+ 645 × 4000 resulting in 2580000

= 2697390
