Alright, let's work through 5385 times 4090 step by step
5385 × 4090 = 4090 × (5385)
+ 4090 × 5 resulting in 20450
+ 4090 × 80 yielding 327200
+ 4090 × 300 that equals 1227000
+ 4090 × 5000 what gives us 20450000

= 22024650
