No problem, we've got 28300421 and 52239963 to multiply
28300421 × 52239963 = 52239963 × (28300421)
+ 52239963 × 1 producing 52239963
+ 52239963 × 20 that results in 1044799260
+ 52239963 × 400 yielding 20895985200
+ 52239963 × 0000 yielding 0
+ 52239963 × 00000 yielding 0
+ 52239963 × 300000 what gives us 15671988900000
+ 52239963 × 8000000 that results in 417919704000000
+ 52239963 × 20000000 that equals 1044799260000000

= 1478412945924423
