Question 1005846
{{{I="501,187"I[0]}}} , so the magnitude is
{{{log(10,"501,187"I[0]/I[0])=log(10,"501,187")=log("501,187")=highlight(5.7)}}} .


NOTES:
If the base of a logarithm is {{{10}}} , we usually do not write it,
so {{{log(10,"501,187")=log("501,187")}}} .
You can calculate {{{log("501,187")}}} with most calculators.