Use the form below to do your conversion.
Solution
Step1
Log217789=Log(7789) ÷ Log(21)
Log(7789)= 3.8914817038395
Log(21)=1.3222192947339
Log217789=3.8914817038395 ÷ 1.3222192947339
Ans=2.9431439393891
Step2
Alternatively, the logarithm can be calculated like this.