Alright, let's work through 1902 times 2275 step by step
1902 × 2275 = 2275 × (1902)
+ 2275 × 2 yielding 4550
+ 2275 × 00 what gives us 0
+ 2275 × 900 resulting in 2047500
+ 2275 × 1000 yielding 2275000

= 4327050
