Alright, let's work through 4280 times 1840 step by step
4280 × 1840 = 1840 × (4280)
+ 1840 × 0 which equals 0
+ 1840 × 80 giving us 147200
+ 1840 × 200 that equals 368000
+ 1840 × 4000 giving us 7360000

= 7875200
