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1. 10 by 10:
formula: head by head, Oka O, O O.
example: 12 × 14=?The
solution: 1 * 1=1
    2 + 4 = 6
    2 * 4 = 8
        12 × 14=168
note: a bit multiply, not two digits to 0 occupancy.

2 the same, Ogo (Oai Ka is equal to 10):
formula: a head and 1, head by head, O O.
example: 23 × 27=?The
solution: 2 + 1 = 3
2 * 3 = 6
3 * 7 = 21
        23 × 27=621
note: a bit multiply, not two digits to 0 occupancy.

3 the first multiplier complementary, another multiplier same number:
formula: a head and 1, head by head Vente de maillots de football, O O.
example: 37 × 44=?
: 3+1=4
      &nbsp cravatta Lv; 4 * 4=16
        7 * 4=28
        37 × 44=1628
note: a bit multiply, not two digits to 0 occupancy.

4 by dozens of dozens of:
formula: head by head, head and head, O O.
example: 21 × 41=?The
solution: 2 * 4=8
        2+4=6
        1 * 1=1
        21 * 41=861

5.11 by any number:
formula: both fixed whereabouts, middle and down.
example: 11 × 23125=?
: 2+3=5
        3+1=4
        1+2=3
        2+5=7
        2 and 5 respectively in the
        11 * 23125=254375
& nbsp;       note: full ten to one.

6 dozen by arbitrary number:
&nbsp Cravate de soie homme Paul Smith;                       &nbsp solde casquettes Burberry;   formula: second multiplier first not trend of falling, a multiplied by second factor behind the first factor of each number, Ka Shimoto number, and then to fall.
example: 13 × 326=?Solution:
13 is 3
  &nbsp chapeaux ralph lauren baseball pas cher;     3 * 3+2=11
        3 * 2+6=12
        3 * 6=18
        13 * 326=4238
            note: and over ten to enter a.&nbsp Robes de Soirée Pas Cher;