Alright, let's work through 4130 times 4891 step by step
4130 × 4891 = 4891 × (4130)
+ 4891 × 0 producing 0
+ 4891 × 30 giving us 146730
+ 4891 × 100 which equals 489100
+ 4891 × 4000 resulting in 19564000

= 20199830
