If gas costs \( \$ 2.35 \) a gallon, and it takes 16.3 gallons to fill up my tank. How much will a tank of gas cost?

Step 1 ：\( \text{Cost per gallon} = \$2.35 \)

Step 2 ：\( \text{Gallons needed} = 16.3 \)

Step 3 ：\( \text{Total cost} = \$2.35 \times 16.3 = \$38.305 \)