Alright, let's work through 7821 times 1870 step by step
7821 × 1870 = 1870 × (7821)
+ 1870 × 1 yielding 1870
+ 1870 × 20 that is equal 37400
+ 1870 × 800 yielding 1496000
+ 1870 × 7000 that is equal 13090000

= 14625270
