Use the form below to do your conversion.
Solution
Step1
Log21857=Log(857) ÷ Log(21)
Log(857)= 2.9329808219232
Log(21)=1.3222192947339
Log21857=2.9329808219232 ÷ 1.3222192947339
Ans=2.2182257009897
Step2
Alternatively, the logarithm can be calculated like this.