Alright, let's work through 8160 times 994 step by step
8160 × 994 = 994 × (8160)
+ 994 × 0 yielding 0
+ 994 × 60 yielding 59640
+ 994 × 100 that equals 99400
+ 994 × 8000 that results in 7952000

= 8111040
