Use the form below to do your conversion.
Solution
Step1
Log219989=Log(9989) ÷ Log(21)
Log(9989)= 3.9995220131289
Log(21)=1.3222192947339
Log219989=3.9995220131289 ÷ 1.3222192947339
Ans=3.0248552785896
Step2
Alternatively, the logarithm can be calculated like this.