(-0.3)×(-5)×(-0.4)×(-0.8)×(-1)²

To calculate the given expression, we need to multiply all the numbers together:

(-0.3) x (-5) x (-0.4) x (-0.8) x (-1)²

= 0.3 x 5 x 0.4 x 0.8 x 1² = 0.3 x 5 x 0.4 x 0.8 x 1 = 0.12

Therefore, the result of the given expression is 0.12.