Use the form below to do your conversion.
Solution
Step1
Log213871=Log(3871) ÷ Log(21)
Log(3871)= 3.587823171319
Log(21)=1.3222192947339
Log213871=3.587823171319 ÷ 1.3222192947339
Ans=2.7134857172395
Step2
Alternatively, the logarithm can be calculated like this.