Question: how to calculate a log with a different base?
Answer: Step 1: Change the Base to 10. Using the change of base formula, you have. ... 
Step 2: Solve for the Numerator and Denominator. Since your calculator is equipped to solve base-10 logarithms explicitly, you can quickly find that log 50 = 1.699 and log 2 = 0.3010.
Step 3: Divide to Get the Solution. 1.699/0.3010 = 5.644.