No problem, we've got 8139 and 5859 to multiply
8139 × 5859 = 5859 × (8139)
+ 5859 × 9 giving us 52731
+ 5859 × 30 which equals 175770
+ 5859 × 100 what gives us 585900
+ 5859 × 8000 what gives us 46872000

= 47686401
