Alright, let's work through 3390 times 146 step by step
3390 × 146 = 146 × (3390)
+ 146 × 0 which equals 0
+ 146 × 90 which equals 13140
+ 146 × 300 which equals 43800
+ 146 × 3000 that is equal 438000

= 494940
