Alright, let's work through 4260 times 7997 step by step
4260 × 7997 = 7997 × (4260)
+ 7997 × 0 that equals 0
+ 7997 × 60 that is equal 479820
+ 7997 × 200 what gives us 1599400
+ 7997 × 4000 that equals 31988000

= 34067220
