Alright, let's work through 1539 times 1789 step by step
1539 × 1789 = 1789 × (1539)
+ 1789 × 9 what gives us 16101
+ 1789 × 30 which equals 53670
+ 1789 × 500 that results in 894500
+ 1789 × 1000 giving us 1789000

= 2753271
