Alright, let's work through 1905 times 424 step by step
1905 × 424 = 424 × (1905)
+ 424 × 5 that is equal 2120
+ 424 × 00 resulting in 0
+ 424 × 900 yielding 381600
+ 424 × 1000 giving us 424000

= 807720
