No problem, we've got 4105 and 9983 to multiply
4105 × 9983 = 9983 × (4105)
+ 9983 × 5 giving us 49915
+ 9983 × 00 yielding 0
+ 9983 × 100 that results in 998300
+ 9983 × 4000 that is equal 39932000

= 40980215
