We're going to solve 1997 multiplied by 1153
1997 × 1153 = 1153 × (1997)
+ 1153 × 7 yielding 8071
+ 1153 × 90 that is equal 103770
+ 1153 × 900 that equals 1037700
+ 1153 × 1000 that is equal 1153000

= 2302541
