Alright, let's work through 3890 times 7265 step by step
3890 × 7265 = 7265 × (3890)
+ 7265 × 0 what gives us 0
+ 7265 × 90 giving us 653850
+ 7265 × 800 resulting in 5812000
+ 7265 × 3000 resulting in 21795000

= 28260850
