Alright, let's work through 9780 times 1989 step by step
9780 × 1989 = 1989 × (9780)
+ 1989 × 0 that results in 0
+ 1989 × 80 that is equal 159120
+ 1989 × 700 giving us 1392300
+ 1989 × 9000 that is equal 17901000

= 19452420
