Alright, let's work through 4989 times 9091 step by step
4989 × 9091 = 9091 × (4989)
+ 9091 × 9 which equals 81819
+ 9091 × 80 producing 727280
+ 9091 × 900 that results in 8181900
+ 9091 × 4000 that is equal 36364000

= 45354999
