No problem, we've got 2340 and 3821 to multiply
2340 × 3821 = 3821 × (2340)
+ 3821 × 0 what gives us 0
+ 3821 × 40 that is equal 152840
+ 3821 × 300 producing 1146300
+ 3821 × 2000 producing 7642000

= 8941140
