Use the form below to do your conversion.
Solution
Step1
Log21787=Log(787) ÷ Log(21)
Log(787)= 2.8959747323591
Log(21)=1.3222192947339
Log21787=2.8959747323591 ÷ 1.3222192947339
Ans=2.1902378401926
Step2
Alternatively, the logarithm can be calculated like this.