No problem, we've got 1580 and 7000 to multiply
1580 × 7000 = 7000 × (1580)
+ 7000 × 0 what gives us 0
+ 7000 × 80 resulting in 560000
+ 7000 × 500 that results in 3500000
+ 7000 × 1000 yielding 7000000

= 11060000
