Alright, let's work through 7977 times 9787 step by step
7977 × 9787 = 9787 × (7977)
+ 9787 × 7 what gives us 68509
+ 9787 × 70 what gives us 685090
+ 9787 × 900 that results in 8808300
+ 9787 × 7000 that results in 68509000

= 78070899
