Find the key on your calculator that has ex above it. You may have
to use 2ND before it.
Or else go here:
https://www.google.com/search?source=hp&ei=OhSZXL-POsOQggfN0ZmADA&q=online+calculator&oq=online&gs_l=psy-ab.1.2.0l2j0i131j0l3j0i131j0l3.5471.7643..11418...0.0..0.360.822.4j1j0j1......0....1..gws-wiz.....0.8gPadnSUeI0
Click on Inv then ex then 6 then =
And the other one use 3.1 instead of 6. The decimal may be hard to see
on that site. It's the key on the bottom row between the 0 and the =.
Edwin