No problem, we've got 8459 and 8420 to multiply
8459 × 8420 = 8420 × (8459)
+ 8420 × 9 yielding 75780
+ 8420 × 50 that equals 421000
+ 8420 × 400 that results in 3368000
+ 8420 × 8000 that results in 67360000

= 71224780
