multiplication and division.

in the cold november rain..
what could be happen if + meet with -.. such an example 2+ -3.. for sure the answer is -1.
from here we conclude that +- would become -. we understand that there are 4 rule as followed:

1) ++ = +
2) +-  = -
3) -+ = -
4) --  = -

did we ever think about multiplication and division on the same cases as above, what would be happen if the do meet one another. The answer are lie on the number operation itself.  such case for instance is 2x(3/8) = 2x3/8.. the case can be simplified like the subtraction and addition as an properties above.

1) xx = x

2) x/ =  /

3) /x = /

4) // = x