Alright, let's work through 7291 times 1728 step by step
7291 × 1728 = 1728 × (7291)
+ 1728 × 1 yielding 1728
+ 1728 × 90 what gives us 155520
+ 1728 × 200 producing 345600
+ 1728 × 7000 that is equal 12096000

= 12598848
