BroWe flew Mumbai to Europe and back multi city at 54000 return fare.(4 flights)
that would work out to 27000 for one way.
So after deducting the taxes of 11243 that you only mentioned, the 27500 Qatar points will be worth less than 16000
But where in Europe did you fly ?
The fares which i posted where or Paris and Zurich from Delhi
And in case you got those at flights at 16k then its not advisable to use miles for such fares.
Generally a flight from Delhi to Paris/Zurich one way decent flight costs about 40k
In peak season that could go about 50-60k one way
Like in January , the same flight which is available at 27500 avios + 11k INR is available at 60,000 INR in normal fare.