Use the form below to do your conversion.
Solution
Step1
Log213973=Log(3973) ÷ Log(21)
Log(3973)= 3.5991185650554
Log(21)=1.3222192947339
Log213973=3.5991185650554 ÷ 1.3222192947339
Ans=2.7220284709123
Step2
Alternatively, the logarithm can be calculated like this.