To simplify \( 1000^{2/3} \), we start by rewriting 1000 in terms of powers of 10:
\[ 1000 = 10^3 \]
Now, substituting this into the expression:
\[ 1000^{2/3} = (10^3)^{2/3} \]
Using the properties of exponents, we can simplify this further:
\[ (10^3)^{2/3} = 10^{3 \cdot (2/3)} = 10^2 = 100 \]
Therefore, the correct simplification of \( 1000^{2/3} \) is \( 100 \).
Thus, Kali has the correct value.