Alright, let's work through 7770 times 5489 step by step
7770 × 5489 = 5489 × (7770)
+ 5489 × 0 giving us 0
+ 5489 × 70 giving us 384230
+ 5489 × 700 what gives us 3842300
+ 5489 × 7000 producing 38423000

= 42649530
