To write the number \(5.204 \times 10^2\) in standard form (also known as scientific notation), you need to express it in a way that indicates it as a regular decimal number.
To do this, you perform the multiplication:
\[ 5.204 \times 10^2 = 5.204 \times 100 = 520.4 \]
Therefore, the number \(5.204 \times 10^2\) in standard form is \(520.4\).