No problem, we've got 7971 and 9715 to multiply
7971 × 9715 = 9715 × (7971)
+ 9715 × 1 what gives us 9715
+ 9715 × 70 what gives us 680050
+ 9715 × 900 that equals 8743500
+ 9715 × 7000 yielding 68005000

= 77438265
