Alright, let's work through 2708 times 1840 step by step
2708 × 1840 = 1840 × (2708)
+ 1840 × 8 what gives us 14720
+ 1840 × 00 which equals 0
+ 1840 × 700 that results in 1288000
+ 1840 × 2000 which equals 3680000

= 4982720
