Alright, let's work through 7886 times 1776 step by step
7886 × 1776 = 1776 × (7886)
+ 1776 × 6 yielding 10656
+ 1776 × 80 that is equal 142080
+ 1776 × 800 that is equal 1420800
+ 1776 × 7000 resulting in 12432000

= 14005536
