Alright, let's work through 7724 times 1055 step by step
7724 × 1055 = 1055 × (7724)
+ 1055 × 4 that equals 4220
+ 1055 × 20 yielding 21100
+ 1055 × 700 producing 738500
+ 1055 × 7000 yielding 7385000

= 8148820
