No problem, we've got 1821 and 4825 to multiply
1821 × 4825 = 4825 × (1821)
+ 4825 × 1 what gives us 4825
+ 4825 × 20 that results in 96500
+ 4825 × 800 that equals 3860000
+ 4825 × 1000 yielding 4825000

= 8786325
