Alright, let's work through 1916 times 1641 step by step
1916 × 1641 = 1641 × (1916)
+ 1641 × 6 yielding 9846
+ 1641 × 10 that is equal 16410
+ 1641 × 900 that equals 1476900
+ 1641 × 1000 that results in 1641000

= 3144156
