Alright, let's work through 7639 times 9917 step by step
7639 × 9917 = 9917 × (7639)
+ 9917 × 9 that results in 89253
+ 9917 × 30 which equals 297510
+ 9917 × 600 what gives us 5950200
+ 9917 × 7000 which equals 69419000

= 75755963
