V = l * w * h
l = 5 1/4
W = 3 1/2
H = 4
[tex] \test{V} = \dfrac{21}{4} * \dfrac{4}{1} * \dfrac{7}{2} = \dfrac{147}{2} = 73 \dfrac{1}{2} \text{ Answer}[/tex]
Notes
1. I've used 4/1 rather than 4 as one of the dimensions. 4/1 is easier to see
2. The 4s cancel in the first step. That makes both the numerator and denominator easier to read.]
3. In decimal form the answer is 73.5
