No problem, we've got 4821 and 4487 to multiply
4821 × 4487 = 4487 × (4821)
+ 4487 × 1 which equals 4487
+ 4487 × 20 that results in 89740
+ 4487 × 800 yielding 3589600
+ 4487 × 4000 that results in 17948000

= 21631827
