No problem, we've got 7821 and 463 to multiply
7821 × 463 = 463 × (7821)
+ 463 × 1 what gives us 463
+ 463 × 20 resulting in 9260
+ 463 × 800 what gives us 370400
+ 463 × 7000 giving us 3241000

= 3621123
