We're going to solve 1780 multiplied by 9855
1780 × 9855 = 9855 × (1780)
+ 9855 × 0 what gives us 0
+ 9855 × 80 yielding 788400
+ 9855 × 700 resulting in 6898500
+ 9855 × 1000 that is equal 9855000

= 17541900
