The number of cubic yards of dirt, $\displaystyle {D}$, needed to cover a garden with area $\displaystyle {a}$ square feet is given by $\displaystyle {D}={g{{\left({a}\right)}}}$

A garden with area 1000 $\displaystyle {f}{t}^{{2}}$ requires 40 cubic yards of dirt. Express this information as an equation, in terms of the function g.

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