No problem, we've got 1245 and 4421 to multiply
1245 × 4421 = 4421 × (1245)
+ 4421 × 5 that is equal 22105
+ 4421 × 40 that is equal 176840
+ 4421 × 200 what gives us 884200
+ 4421 × 1000 resulting in 4421000

= 5504145
