No problem, we've got 8105 and 5012 to multiply
8105 × 5012 = 5012 × (8105)
+ 5012 × 5 that is equal 25060
+ 5012 × 00 that equals 0
+ 5012 × 100 which equals 501200
+ 5012 × 8000 that is equal 40096000

= 40622260
