Alright, let's work through 4851 times 4326 step by step
4851 × 4326 = 4326 × (4851)
+ 4326 × 1 resulting in 4326
+ 4326 × 50 that equals 216300
+ 4326 × 800 that results in 3460800
+ 4326 × 4000 which equals 17304000

= 20985426
