To find the missing number in the equation \( 327.00 \times x = 32.70 \), we need to solve for \( x \).
We can do this by dividing both sides of the equation by \( 327.00 \):
\[ x = \frac{32.70}{327.00} \]
Now, we'll perform the division:
\[ x = \frac{32.70}{327.00} = 0.1 \]
Thus, the missing number is:
\[ \boxed{0.1} \]