Alright, let's work through 1792 times 856 step by step
1792 × 856 = 856 × (1792)
+ 856 × 2 which equals 1712
+ 856 × 90 what gives us 77040
+ 856 × 700 yielding 599200
+ 856 × 1000 that is equal 856000

= 1533952
