Non inverting OpAmp with NPN amplification factor > 1
simulate this circuit &ndash; Schematic created using CircuitLab

You need a non-inverting amplifier circuit with a resistor ratio of 2:1. 

Gain is 1 + R1/R2 = 1 + 20K/10K = 3. 



The resistors are standard E96 values, so you can use 1% parts or better if you like.