No problem, we've got 5620 and 8139 to multiply
5620 × 8139 = 8139 × (5620)
+ 8139 × 0 what gives us 0
+ 8139 × 20 which equals 162780
+ 8139 × 600 that equals 4883400
+ 8139 × 5000 resulting in 40695000

= 45741180
