Use the form below to do your conversion.
Solution
Step1
Log213977=Log(3977) ÷ Log(21)
Log(3977)= 3.599555590986
Log(21)=1.3222192947339
Log213977=3.599555590986 ÷ 1.3222192947339
Ans=2.7223589954572
Step2
Alternatively, the logarithm can be calculated like this.