No problem, we've got 5109 and 7994 to multiply
5109 × 7994 = 7994 × (5109)
+ 7994 × 9 what gives us 71946
+ 7994 × 00 resulting in 0
+ 7994 × 100 resulting in 799400
+ 7994 × 5000 giving us 39970000

= 40841346
