Alright, let's work through 2978 times 3945 step by step
2978 × 3945 = 3945 × (2978)
+ 3945 × 8 that results in 31560
+ 3945 × 70 what gives us 276150
+ 3945 × 900 resulting in 3550500
+ 3945 × 2000 producing 7890000

= 11748210
