Alright, let's work through 7865 times 8156 step by step
7865 × 8156 = 8156 × (7865)
+ 8156 × 5 that equals 40780
+ 8156 × 60 yielding 489360
+ 8156 × 800 that equals 6524800
+ 8156 × 7000 which equals 57092000

= 64146940
