Answer
$$ 512$$
Explanation :
To cube a number means to multiply the number by itself three times .
In your case , we have
$$8^{3}$$
To find the value of 8 cubed, determine the value of $$ 8 \times 8 \times 8 $$
$$8 \times 8 \times 8 $$
$$64 = \times 8 $$
$$ = 512$$