We're going to solve 7815 multiplied by 5039
7815 × 5039 = 5039 × (7815)
+ 5039 × 5 resulting in 25195
+ 5039 × 10 which equals 50390
+ 5039 × 800 giving us 4031200
+ 5039 × 7000 yielding 35273000

= 39379785
