I just had to Google it....

Here it goes:

Hold up both hands in front of you, fingers apart, palms facing away
from you. Now bend over the finger that you want to multiply nine by,
counting fingers from left to right. For example, to multiple nine by
six, bend over the thumb on your right hand (the sixth finger).

Count the number of fingers to the left of the bent finger. This is your
10s positition. Count the number of fingers to the right of the bent
finger. This is your 1s position. If you bend over the sixth finger, you
have five fingers to the left and four fingers to the right of the
thumb. Hence 9*6=54.

Two suggestions, which might make this method interesting for older
students:

The method works for any base-n, multiplying by "n-1". To multiply a
number by 7 in base-8, draw an eight fingered "alien" and bend over the
appropriate finger.

It also works with multipliers greater than 10. There are some
restrictions, and you have to reserve fingers for the 100s position, but
it is possible with some numbers.

Hope this helps....