Let's calculate 4345 x 4839
4345 × 4839 = 4839 × (4345)
+ 4839 × 5 that equals 24195
+ 4839 × 40 that results in 193560
+ 4839 × 300 that is equal 1451700
+ 4839 × 4000 that is equal 19356000

= 21025455
