Alright, let's work through 6445 times 2805 step by step
6445 × 2805 = 2805 × (6445)
+ 2805 × 5 what gives us 14025
+ 2805 × 40 giving us 112200
+ 2805 × 400 giving us 1122000
+ 2805 × 6000 that results in 16830000

= 18078225
