There are two main formats of visa being issued by Russian consulates at the moment (in addition to the rare separate paper version) and they will appear as a sticker placed into one of the blank pages in your passport. Please note, the page must be absolutely clean with no other visas, stamps or marks for the consulate to be able to use it.
In the UK, Europe, North America and Australia as well as many Asian counties you will find the new style visa pale pink visa with a hologram impress. Click here for details on how to read this type of visa.
In more "remote" consulates you will find the older brown version without the hologram impress. Click here for details on how to read this type of visa.
All of the headings on the visa are both in Russian and English, so reading the validity period, section 4, should present no problem. However, information such as the type of visa and number of entries is in Russian only. This brief guide will help you confirm the details are correct.