No problem, we've got 1380 and 5280 to multiply
1380 × 5280 = 5280 × (1380)
+ 5280 × 0 resulting in 0
+ 5280 × 80 yielding 422400
+ 5280 × 300 giving us 1584000
+ 5280 × 1000 resulting in 5280000

= 7286400
