Q: What are the most digits you can hold in a calculator?

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You work it out on paper or just use a calculator

If you type this on any calculator, you will lose the last digits. These last digits are unimportant for most practical purposes. You can just type the numbers in scientific notation, for example 9.999999e17 x 1.2324e14, and get an answer that's close enough for most practical purposes. If you want every last digit - not needed for most practical applications - you can type the factors into the Wolfram Alpha site (use the asterisk for multiplication). Or, you can get yourself a Python interpreter, and do lots of such calculations offline. Python is a programming language, but you can easily use it as a calculator - and it keeps ALL the digits in such calculations.

You type the digits, one after the other, from left to right.

No. For example, 1/3 = 0.333333333...(repeats forever). The calculator can only display finitely many digits.

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Use a calculator!

You can try to subtract the first few digits that are displayed from the answer, but note that calculators work to a limited precision so you may not be able to get much more than 10 to 12 digits this way and if the decimal has more than 12 digits you will not be able to find all the digits. The only solution is to do the long division (by hand, using the digits displayed by the calculator, but when you run out of digits in the calculator, you can start a new division using the remainder so far to continue for the next few digits). Alternatively, find a calculator which works to more precision.

urm..... use a calculator

Most calculators use the rounded-off version of pi, which is 3.14159265 (eight significant digits are more than most math problems will require).

You can calculate that on any calculator, and get a result with 10 significant digits or so - more than you need for most practical situations. In Excel, you get 15-16 significant digits. If you really want all the digits, you can:* Use the Wolfram Alpha website. Use "*" for multiplication. * Install a program that can handle more digits. For example, a Python interpreter will work just fine, and you can use it as a calculator.

When in the calculator app, hold your phone longways.

Most calculators can't handle that many digits, but you can type this sort of calculation in the Wolfram Alpha site.Note that for most practical applications, you don't need that many significant digits; so the number of digits handled by a scientific calculator (usually 10-12 digits) works quite well.

The answer seems 16386177460000, because of: 1,638617746*10000000000000=16386177460000 (can you read this number? :).But in fact this may not be true. It may be any number between 16386177460000 and 16386177464999. The reason is that your result is, most probably, approximate, e.g. not exact. It seems that you have 10-digit calculator. It means that it can store only 10 digits of result of each operation.If you need an exact result then try to recalculate using at least 14-digits calculator or software calculator.

You work it out on paper or just use a calculator

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If you type this on any calculator, you will lose the last digits. These last digits are unimportant for most practical purposes. You can just type the numbers in scientific notation, for example 9.999999e17 x 1.2324e14, and get an answer that's close enough for most practical purposes. If you want every last digit - not needed for most practical applications - you can type the factors into the Wolfram Alpha site (use the asterisk for multiplication). Or, you can get yourself a Python interpreter, and do lots of such calculations offline. Python is a programming language, but you can easily use it as a calculator - and it keeps ALL the digits in such calculations.

You type the digits, one after the other, from left to right.