Alright, let's work through 7740 times 1805 step by step
7740 × 1805 = 1805 × (7740)
+ 1805 × 0 producing 0
+ 1805 × 40 that is equal 72200
+ 1805 × 700 that equals 1263500
+ 1805 × 7000 producing 12635000

= 13970700
