Alright, let's work through 1854 times 4220 step by step
1854 × 4220 = 4220 × (1854)
+ 4220 × 4 resulting in 16880
+ 4220 × 50 what gives us 211000
+ 4220 × 800 resulting in 3376000
+ 4220 × 1000 resulting in 4220000

= 7823880
