Density of a 120 g stone from water displacement in overflow container

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A overflow container that its overflow level is $100$ $cm^3$ has $80$ $cm^3$ water. When a stone that is $120$ $g$ is being dropped into the overflow container, the water increases $10$ $cm^3$.

How to find the density?

I currently don't have any idea about it.
 
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Bobs said:
A overflow container that its overflow level is $100$ $cm^3$ has $80$ $cm^3$ water. When a stone that is $120$ $g$ is being dropped into the overflow container, the water increases $10$ $cm^3$.

How to find the density?

I currently don't have any idea about it.
What are the units of density?
 
What equation relates volume, mass and density?
 
I just noticed you deleted the template. Please don't do that. It is there for a reason.
 
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That's all are d = m/v but I don't know how to apply it.
 
Bobs said:
That's all are d = m/v but I don't know how to apply it.
In this specific problem, what is m equal to?