No problem, we've got 8104 and 1961 to multiply
8104 × 1961 = 1961 × (8104)
+ 1961 × 4 giving us 7844
+ 1961 × 00 which equals 0
+ 1961 × 100 which equals 196100
+ 1961 × 8000 that results in 15688000

= 15891944
