Alright, let's work through 1897 times 4080 step by step
1897 × 4080 = 4080 × (1897)
+ 4080 × 7 which equals 28560
+ 4080 × 90 yielding 367200
+ 4080 × 800 which equals 3264000
+ 4080 × 1000 what gives us 4080000

= 7739760
