Alright, let's work through 9841 times 2158 step by step
9841 × 2158 = 2158 × (9841)
+ 2158 × 1 resulting in 2158
+ 2158 × 40 which equals 86320
+ 2158 × 800 that equals 1726400
+ 2158 × 9000 yielding 19422000

= 21236878
