Alright, let's work through 3890 times 5798 step by step
3890 × 5798 = 5798 × (3890)
+ 5798 × 0 giving us 0
+ 5798 × 90 resulting in 521820
+ 5798 × 800 yielding 4638400
+ 5798 × 3000 giving us 17394000

= 22554220
