We're going to solve 5391 multiplied by 9915
5391 × 9915 = 9915 × (5391)
+ 9915 × 1 giving us 9915
+ 9915 × 90 which equals 892350
+ 9915 × 300 giving us 2974500
+ 9915 × 5000 that is equal 49575000

= 53451765
