Use the form below to do your conversion.
Solution
Step1
Log217123=Log(7123) ÷ Log(21)
Log(7123)= 3.8526629443446
Log(21)=1.3222192947339
Log217123=3.8526629443446 ÷ 1.3222192947339
Ans=2.9137851487184
Step2
Alternatively, the logarithm can be calculated like this.