Alright, let's work through 7780 times 1702 step by step
7780 × 1702 = 1702 × (7780)
+ 1702 × 0 which equals 0
+ 1702 × 80 producing 136160
+ 1702 × 700 that is equal 1191400
+ 1702 × 7000 giving us 11914000

= 13241560
