Answer :
We start with the equation
$$
10^{-2} \times x = 10^{-4}.
$$
To isolate $x$, we divide both sides by $10^{-2}$:
$$
x = \frac{10^{-4}}{10^{-2}}.
$$
Using the exponent rule for division, which states that
$$
\frac{a^m}{a^n} = a^{m-n},
$$
we have
$$
x = 10^{-4 - (-2)} = 10^{-4+2} = 10^{-2}.
$$
Thus, you need to multiply $10^{-2}$ by $10^{-2}$ to obtain $10^{-4}$.
$$
10^{-2} \times x = 10^{-4}.
$$
To isolate $x$, we divide both sides by $10^{-2}$:
$$
x = \frac{10^{-4}}{10^{-2}}.
$$
Using the exponent rule for division, which states that
$$
\frac{a^m}{a^n} = a^{m-n},
$$
we have
$$
x = 10^{-4 - (-2)} = 10^{-4+2} = 10^{-2}.
$$
Thus, you need to multiply $10^{-2}$ by $10^{-2}$ to obtain $10^{-4}$.