We're going to solve 5391 multiplied by 1012
5391 × 1012 = 1012 × (5391)
+ 1012 × 1 that is equal 1012
+ 1012 × 90 resulting in 91080
+ 1012 × 300 which equals 303600
+ 1012 × 5000 giving us 5060000

= 5455692
