To solve the equation \( __ \div \frac{10}{1} = 2.3 \), we can rewrite it as:
\[ __ \div 10 = 2.3 \]
To find the value that completes the equation, we multiply both sides by 10:
\[ __ = 2.3 \times 10 \]
Calculating that gives us:
\[ __ = 23 \]
So, the value that completes the equation is 23.