Use the form below to do your conversion.
Solution
Step1
Log217945=Log(7945) ÷ Log(21)
Log(7945)= 3.9000939015434
Log(21)=1.3222192947339
Log217945=3.9000939015434 ÷ 1.3222192947339
Ans=2.9496573806452
Step2
Alternatively, the logarithm can be calculated like this.