Use the form below to do your conversion.
Solution
Step1
Log21407=Log(407) ÷ Log(21)
Log(407)= 2.6095944092252
Log(21)=1.3222192947339
Log21407=2.6095944092252 ÷ 1.3222192947339
Ans=1.9736472002932
Step2
Alternatively, the logarithm can be calculated like this.