INTEGERS- MULTIPLYING-115a

Rule 1. a minus number   X   a minus number equals a PLUS.
            -1 X -3 = +6
     2. a plus number    X     a minus number equals a MINUS.
            +1 X -3 = -3
     3. a minus number    X   a plus number will equal a MINUS.
       
             -1 X +3 = -6
     4. a plus number   X    a plus number will equal a PLUS.
        
             +1 X +3 = +3
 Examples:    
             -120  X  -134  = + 16080
             +120  X  -134  = - 16080
             -120  X  +134  = - 16080
             +120  X  +134  = + 16080
END