No problem, we've got 1819 and 1821 to multiply
1819 × 1821 = 1821 × (1819)
+ 1821 × 9 what gives us 16389
+ 1821 × 10 that results in 18210
+ 1821 × 800 yielding 1456800
+ 1821 × 1000 that is equal 1821000

= 3312399
