Alright, let's work through 2012 times 7720 step by step
2012 × 7720 = 7720 × (2012)
+ 7720 × 2 what gives us 15440
+ 7720 × 10 giving us 77200
+ 7720 × 000 what gives us 0
+ 7720 × 2000 which equals 15440000

= 15532640
