Alright, let's work through 9960 times 1982 step by step
9960 × 1982 = 1982 × (9960)
+ 1982 × 0 producing 0
+ 1982 × 60 giving us 118920
+ 1982 × 900 that equals 1783800
+ 1982 × 9000 producing 17838000

= 19740720
