No problem, we've got 8521 and 5603 to multiply
8521 × 5603 = 5603 × (8521)
+ 5603 × 1 what gives us 5603
+ 5603 × 20 that results in 112060
+ 5603 × 500 that results in 2801500
+ 5603 × 8000 that is equal 44824000

= 47743163
