No problem, we've got 4380 and 4945 to multiply
4380 × 4945 = 4945 × (4380)
+ 4945 × 0 producing 0
+ 4945 × 80 that equals 395600
+ 4945 × 300 resulting in 1483500
+ 4945 × 4000 that results in 19780000

= 21659100
