Alright, let's work through 1865 times 8505 step by step
1865 × 8505 = 8505 × (1865)
+ 8505 × 5 that is equal 42525
+ 8505 × 60 that results in 510300
+ 8505 × 800 resulting in 6804000
+ 8505 × 1000 that is equal 8505000

= 15861825
