We're going to solve 7121 multiplied by 1111
7121 × 1111 = 1111 × (7121)
+ 1111 × 1 resulting in 1111
+ 1111 × 20 that equals 22220
+ 1111 × 100 that results in 111100
+ 1111 × 7000 that results in 7777000

= 7911431
