Use the form below to do your conversion.
Solution
Step1
Log21355=Log(355) ÷ Log(21)
Log(355)= 2.5502283530551
Log(21)=1.3222192947339
Log21355=2.5502283530551 ÷ 1.3222192947339
Ans=1.9287484029404
Step2
Alternatively, the logarithm can be calculated like this.