To find the area of a rectangular garden plot, you can use the formula:
\[ \text{Area} = \text{Length} \times \text{Width} \]
In this case, the length is 25 meters and the width is 16 meters.
Calculating the area:
\[ \text{Area} = 25 , \text{m} \times 16 , \text{m} = 400 , \text{m}^2 \]
Thus, the area of the garden plot is \( 400 , \text{m}^2 \).