Alright, let's work through 4260 times 7880 step by step
4260 × 7880 = 7880 × (4260)
+ 7880 × 0 producing 0
+ 7880 × 60 that is equal 472800
+ 7880 × 200 which equals 1576000
+ 7880 × 4000 producing 31520000

= 33568800
