Alright, let's work through 4828 times 2102 step by step
4828 × 2102 = 2102 × (4828)
+ 2102 × 8 what gives us 16816
+ 2102 × 20 which equals 42040
+ 2102 × 800 that equals 1681600
+ 2102 × 4000 giving us 8408000

= 10148456
