To find the volume of a rectangular prism, you multiply its height, length, and width together. Therefore, the correct method for solving this problem is:
V = 7 1/3 × 3 1/4 × 5 1/6
So the correct option is:
V=7 1/3×3 1/4×5 1/6
(upper V equals 7 Start Fraction 1 over 3 End Fraction times 3 Start Fraction 1 over 4 End Fraction times 5 Start Fraction 1 over 6 End Fraction)