Alright, let's work through 7140 times 1857 step by step
7140 × 1857 = 1857 × (7140)
+ 1857 × 0 yielding 0
+ 1857 × 40 resulting in 74280
+ 1857 × 100 that equals 185700
+ 1857 × 7000 resulting in 12999000

= 13258980
