Use the form below to do your conversion.
Solution
Step1
Log21247=Log(247) ÷ Log(21)
Log(247)= 2.3926969532597
Log(21)=1.3222192947339
Log21247=2.3926969532597 ÷ 1.3222192947339
Ans=1.8096067443496
Step2
Alternatively, the logarithm can be calculated like this.