Use the form below to do your conversion.
Solution
Step1
Log216409=Log(6409) ÷ Log(21)
Log(6409)= 3.8067902715841
Log(21)=1.3222192947339
Log216409=3.8067902715841 ÷ 1.3222192947339
Ans=2.87909145385
Step2
Alternatively, the logarithm can be calculated like this.