 $A$ is a Green functor for ${\ensuremath{\mathscr{E}}}$ over $k$ then $A: {\ensuremath{\mathbf{Spn}}}({\ensuremath{\mathscr{E}}}) {\ensuremath{\xymatrix@0@C=00pt{\ar[r]&}}}{\ensuremath{\mathbf{Mod}_k}}$ is monoidal