Alright, let's work through 2105 times 1731 step by step
2105 × 1731 = 1731 × (2105)
+ 1731 × 5 giving us 8655
+ 1731 × 00 what gives us 0
+ 1731 × 100 which equals 173100
+ 1731 × 2000 that results in 3462000

= 3643755
