log 7 (80)
If you mean log780 ....
on your calculator type :
log 80
÷
log7
=
you should get 2.251916...
test it by performing
7^2.251916 to get appr. 80
on your calculator type :
log 80
÷
log7
=
you should get 2.251916...
test it by performing
7^2.251916 to get appr. 80