No problem, we've got 7875 and 1015 to multiply
7875 × 1015 = 1015 × (7875)
+ 1015 × 5 which equals 5075
+ 1015 × 70 which equals 71050
+ 1015 × 800 which equals 812000
+ 1015 × 7000 that results in 7105000

= 7993125
