Alright, let's work through 2378 times 5109 step by step
2378 × 5109 = 5109 × (2378)
+ 5109 × 8 that is equal 40872
+ 5109 × 70 producing 357630
+ 5109 × 300 producing 1532700
+ 5109 × 2000 what gives us 10218000

= 12149202
