Alright, let's work through 3966 times 6787 step by step
3966 × 6787 = 6787 × (3966)
+ 6787 × 6 resulting in 40722
+ 6787 × 60 which equals 407220
+ 6787 × 900 yielding 6108300
+ 6787 × 3000 which equals 20361000

= 26917242
