Alright, let's work through 2106 times 1291 step by step
2106 × 1291 = 1291 × (2106)
+ 1291 × 6 that is equal 7746
+ 1291 × 00 yielding 0
+ 1291 × 100 that equals 129100
+ 1291 × 2000 that is equal 2582000

= 2718846
