(-0,73)*1=
-0,73*(-1)=
(-1)*65.7/8=
(-1)*(-0,99)=

(-0,73)*1=-0,73
-0,73*(-1)=0,73
(-1)*65.7/8=-65.7/8=-8,2125
(-1)*(-0,99)=0,99

1) -0.73
2) 0.73
3) -65.7/8
4)0.99