Manipulating Exponent

Algebra Level 1

3x=2201522015y=81xy= ? \begin{aligned} \large \color{#69047E} {3^x} & = & \color{#3D99F6}{2^{2015}} \\\\ \large \color{#3D99F6}{2^{2015y}} & = & 81 \\\\ \large \color{#20A900}{xy} & = & \ \color{teal} ? \end{aligned}

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