Use the form below to do your conversion.
Solution
Step1
Log218705=Log(8705) ÷ Log(21)
Log(8705)= 3.9397687754533
Log(21)=1.3222192947339
Log218705=3.9397687754533 ÷ 1.3222192947339
Ans=2.9796636542399
Step2
Alternatively, the logarithm can be calculated like this.