No problem, we've got 1826 and 6638 to multiply
1826 × 6638 = 6638 × (1826)
+ 6638 × 6 that results in 39828
+ 6638 × 20 resulting in 132760
+ 6638 × 800 what gives us 5310400
+ 6638 × 1000 yielding 6638000

= 12120988
