1234.5678: 1.234e+3
X:      3
Y:      4
X + Y:      7
X * Y:     12
X - Y:     -1
X / Y:      0
X:     41
Y:     -3
X + Y:     38
X * Y:   -123
X - Y:     44
X / Y:    -13
Float max: 1.797e+308
Float min: 2.225e-308
Float epsilon: 2.220e-16