Alright, let's work through 1378 times 2902 step by step
1378 × 2902 = 2902 × (1378)
+ 2902 × 8 which equals 23216
+ 2902 × 70 yielding 203140
+ 2902 × 300 yielding 870600
+ 2902 × 1000 which equals 2902000

= 3998956
