Alright, let's work through 4210 times 4850 step by step
4210 × 4850 = 4850 × (4210)
+ 4850 × 0 resulting in 0
+ 4850 × 10 what gives us 48500
+ 4850 × 200 giving us 970000
+ 4850 × 4000 resulting in 19400000

= 20418500
