Windows 10: How do I enter numbers in scientific notation in the calculator?

I want to calculate the pH of a solution knowing its [H+} using the formula pH = -log({H+], where [H+] is 6.5x10^-5. is there a simple way to enter 6.5e-5, and the rest of this calculation?

:)

 

Disable Scientific Notation in Windows 10 Calculator

In previous versions of Windows, the calculator worked fine. In Windows 10 it's completely unusable due to a bug (perhaps you'll call it a "feature") of displaying scientific notation when it shouldn't. It operates the same whether in Scientific Mode or
Standard Mode. I want the calculator to ALWAYS display results normally (non-scientific notation) unless the number is so small or large that it can't be displayed. But for small numbers (< 1), whenever it goes below a certain threshold it often reverts to
scientific notation when it shouldn't. For example it displays the following:

1 / 1000 = 0.001

1 / 1001 = 9.99000999000999000999000999001e-4

1 / 2000 = 0.0005

The second case is totally unacceptable. It should display 0.000999000999000999000999000999001

Whatever the case, when deciding to use scientific notation or not, the calculator needs to be consistent, which obviously it isn't. And if it's possible to display a number in non-scientific notation, there must be a way to force that mode.

Furthermore, if I copy the result of the second case, using Control-C, then paste it back in with Control-V, it displays, "Invalid input".

Another annoyance is that on the right side it always shows the history. That feature is fine if I want it, but unfortunately it's always on unless I shrink the calculator's window horizontally until the point where there's no room for it and then it disappears.
Not the end of the world, but a more common approach taken by professional software development teams would be to have a setting for turning on/off history, as well as other features that you may or may not want.

If the Windows 10 calculator cannot be fixed to operate correctly, then is there a way to install the calculator from Windows 7 or another earlier version of Windows? If not I guess I'll need to search the internet for a company that makes a calculator that
works the way I expect a calculator to work, and not this insane auto scientific notation when it's not wanted.

 

How to get answers in scientific notation on windows 10 calculator?

The calculator does not by default use scientific notation for numbers larger than 1, even when in scientific mode. See the picture below, which is using the scientific mode but uses the 'simple" notation for this large number.

To force the calculator to switch to scientific notation here, which would be something like 8.991804e+9, press "F-E" (just above the keypad).

 

How to get answers in scientific notation on windows 10 calculator?

How to get answers in scientific notation on windows 10 calculator? I mean the ANSWER it gives, not how to enter it.

***Post moved by the moderator to the appropriate forum category.***