A square playground has sides that each measure 120 feet in length. On a scale drawing, \( \frac{1}{4} \) inch represents 5 feet on the playground. How long is a side of this playground on the scale drawing?

Step 1 ：\( \text{Scale Ratio} = \frac{\text{Length on Drawing}}{\text{Length on Playground}} \)

Step 2 ：\( \text{Length on Drawing} = \text{Scale Ratio} \times \text{Length on Playground} \)

Step 3 ：\( \text{Length on Drawing} = \frac{1}{4} \times \frac{120}{5} \)