No problem, we've got 5121 and 1200 to multiply
5121 × 1200 = 1200 × (5121)
+ 1200 × 1 producing 1200
+ 1200 × 20 giving us 24000
+ 1200 × 100 that is equal 120000
+ 1200 × 5000 that equals 6000000

= 6145200
