Alright, let's work through 1938 times 4020 step by step
1938 × 4020 = 4020 × (1938)
+ 4020 × 8 which equals 32160
+ 4020 × 30 yielding 120600
+ 4020 × 900 giving us 3618000
+ 4020 × 1000 which equals 4020000

= 7790760
