No problem, we've got 6521 and 3977 to multiply
6521 × 3977 = 3977 × (6521)
+ 3977 × 1 producing 3977
+ 3977 × 20 which equals 79540
+ 3977 × 500 what gives us 1988500
+ 3977 × 6000 yielding 23862000

= 25934017
