Alright, let's work through 9930 times 7964 step by step
9930 × 7964 = 7964 × (9930)
+ 7964 × 0 what gives us 0
+ 7964 × 30 producing 238920
+ 7964 × 900 that results in 7167600
+ 7964 × 9000 resulting in 71676000

= 79082520
