Minimum contract size per average size company ($300,000) x...

Minimum contract size per average size company ($300,000)
x 'confident' client base number (125)
= $37,500,000
Given a P/E ratio of 20, market cap $750,000,000?
Add in "significant scale opportunity "
And "significant traction", revenue model looks pretty good?
What's LinkedIn's P/E ratio? 55 down from like 2000?
Bit of an amateur here so welcome clarification.