Making the questionable assumptions that these are dimensions of a cuboid, the answer is 140 cubic units of volume.
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4/5 of 7 is 5 3/5
5/8 / 4/7 = 5/8 * 7/4 = 5*7 / 8*4 = 35 / 32
5
If the shape is a rectangular prism (cuboid), the volume is 6*4*5 = 120 cubic units.
Yes it would: 7 x 5 x 32 = 7 x 5 x (8 x 4) which is four times 7 x 5 x 8.