Alright, let's work through 8378 times 2187 step by step
8378 × 2187 = 2187 × (8378)
+ 2187 × 8 that is equal 17496
+ 2187 × 70 yielding 153090
+ 2187 × 300 resulting in 656100
+ 2187 × 8000 what gives us 17496000

= 18322686
