Alright, let's work through 1602 times 450 step by step
1602 × 450 = 450 × (1602)
+ 450 × 2 what gives us 900
+ 450 × 00 what gives us 0
+ 450 × 600 which equals 270000
+ 450 × 1000 yielding 450000

= 720900
