Alright, let's work through 4887 times 9131 step by step
4887 × 9131 = 9131 × (4887)
+ 9131 × 7 resulting in 63917
+ 9131 × 80 what gives us 730480
+ 9131 × 800 that results in 7304800
+ 9131 × 4000 giving us 36524000

= 44623197
