Alright, let's work through 4891 times 5380 step by step
4891 × 5380 = 5380 × (4891)
+ 5380 × 1 yielding 5380
+ 5380 × 90 resulting in 484200
+ 5380 × 800 that equals 4304000
+ 5380 × 4000 resulting in 21520000

= 26313580
