Alright, let's work through 1878 times 7787 step by step
1878 × 7787 = 7787 × (1878)
+ 7787 × 8 which equals 62296
+ 7787 × 70 resulting in 545090
+ 7787 × 800 yielding 6229600
+ 7787 × 1000 that equals 7787000

= 14623986
