I am given the following circuit
[![enter image description here][1]][1]

and told to calculate the voltage measured by the voltage meter.

My first thought was to calculate the voltage through \$R_k\$ (at the red dot) and the voltage through \$R_i\$ (at the blue dot) and have the result be their difference. Is my train of thought correct? If not how do I calculate said voltage?


  [1]: https://i.sstatic.net/Vyv46.png