Alright, let's work through 3398 times 4090 step by step
3398 × 4090 = 4090 × (3398)
+ 4090 × 8 that equals 32720
+ 4090 × 90 giving us 368100
+ 4090 × 300 resulting in 1227000
+ 4090 × 3000 that is equal 12270000

= 13897820
