No problem, we've got 4939 and 9931 to multiply
4939 × 9931 = 9931 × (4939)
+ 9931 × 9 what gives us 89379
+ 9931 × 30 giving us 297930
+ 9931 × 900 that is equal 8937900
+ 9931 × 4000 what gives us 39724000

= 49049209
