Field of coordinates in Diophantine equation

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Given any linear homogeneous Diophantine equation all points $(\alpha, \beta)$ on that line forms an infinite Abelian Group.But do there exist any operation that can turn it into a field ? I tried to think of multiplication like operation in that group. But $(\alpha_{1} \alpha_2, \beta_{1} \beta_2)$ is a point in another line (which is a different group). Is there any way to embed this field into some field ?