log base e 4260=x/3
ln 4260=x/3
x=3*ln4260
$${\mathtt{3}}{\mathtt{\,\times\,}}{{log}}_{{\mathtt{e}}}{\left({\mathtt{4\,260}}\right)} = {\mathtt{25.071\: \!073\: \!317\: \!790\: \!248}}$$