Alright, let's work through 7645 times 7715 step by step
7645 × 7715 = 7715 × (7645)
+ 7715 × 5 what gives us 38575
+ 7715 × 40 resulting in 308600
+ 7715 × 600 which equals 4629000
+ 7715 × 7000 what gives us 54005000

= 58981175
