Use the form below to do your conversion.
Solution
Step1
Log217871=Log(7871) ÷ Log(21)
Log(7871)= 3.8960299123962
Log(21)=1.3222192947339
Log217871=3.8960299123962 ÷ 1.3222192947339
Ans=2.9465837686027
Step2
Alternatively, the logarithm can be calculated like this.