To find the area of one splash pad, you can use the formula for the area of a parallelogram:
\[ \text{Area} = \text{base} \times \text{height} \]
For one splash pad, the base is 5.4 meters and the height is 3.8 meters:
\[ \text{Area} = 5.4 , \text{m} \times 3.8 , \text{m} = 20.52 , \text{m}^2 \]
Since there are 4 splash pads, the total area will be:
\[ \text{Total Area} = 4 \times 20.52 , \text{m}^2 = 82.08 , \text{m}^2 \]
Therefore, the total area of the splash pads is 82.08 m².