Use the form below to do your conversion.
Solution
Step1
Log215707=Log(5707) ÷ Log(21)
Log(5707)= 3.756407872549
Log(21)=1.3222192947339
Log215707=3.756407872549 ÷ 1.3222192947339
Ans=2.8409870340796
Step2
Alternatively, the logarithm can be calculated like this.