No problem, we've got 1509 and 6641 to multiply
1509 × 6641 = 6641 × (1509)
+ 6641 × 9 giving us 59769
+ 6641 × 00 that equals 0
+ 6641 × 500 that is equal 3320500
+ 6641 × 1000 what gives us 6641000

= 10021269
