Alright, let's work through 3445 times 4150 step by step
3445 × 4150 = 4150 × (3445)
+ 4150 × 5 that is equal 20750
+ 4150 × 40 giving us 166000
+ 4150 × 400 resulting in 1660000
+ 4150 × 3000 that is equal 12450000

= 14296750
