Alright, let's work through 9557 times 1991 step by step
9557 × 1991 = 1991 × (9557)
+ 1991 × 7 what gives us 13937
+ 1991 × 50 which equals 99550
+ 1991 × 500 that results in 995500
+ 1991 × 9000 that equals 17919000

= 19027987
