Find the product :

(-8) x {(-5) x (-3)}

We have

(-8) x {(-5) x (-3)}

First multiply inside the brace:
(-5) x (-3) = 15

Now multiply the result with the first number:
(-8) x 15 = -(8 x 15) = -120

∴ (-8) x {(-5) x (-3)} = -120