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FutureStarrA 100 Digit Calculator
You know the power of 100. From the ground up, everything you do must start at 2 and proceed onwards in steps, which is the reason behind the tradition of rearranging the cards on the first two decks of cards in a game of 52. But what about when you want to count higher?
Most scientific and graphing calculators can only display possibly up to 10 decimal places of accuracy. While this is enough in most instances of everyday use, it can be fairly limiting for applications where higher standards of accuracy are necessary. Hence the existence of big number calculators such as the one above, that can provide far higher levels of accuracy. Big numbers are more likely to be used in fields such as cosmology, astronomy, mathematics, cryptography, and statistical mechanics.
I greatly appreciate the accuracy and flexibility of this calculator. It's very nice that I can use variables and nest functions, and the functions never seem to completely "zero out" due to a failure of precision like most calculators that are available for calculating hyperbolic trig functions. Especially since I am working with special relativity, where almost every single "daily life"-scale velocity is unbelievably small compared to the speed of light, so I am usually working with fractions on the order of a few billionths or smaller. (Source: keisan.casio.com)
If the next smallest place value is greater than or equal to five (5, 6, 7, 8, or 9), you increase the value of the digit you're rounding to by one (+1). Just like before, any remaining digits before the decimal point become zeros, and any that are after the decimal point are dropped. This is called rounding up.
When multiplying, a useful thing to remember is that the factors of the operands still remain. For example, to say that 14 × 15 was 201 would be unreasonable. Since 15 is a multiple of 5, the product should be as well. Likewise, 14 is a multiple of 2, so the product should be even. Furthermore, any number which is a multiple of both 5 and 2 is necessarily a multiple of 10, and in the decimal system would end with a 0. The correct answer is 210. It is a multiple of 10, 7 (the other prime factor of 14) and 3 (the other prime factor of 15). (Source: en.wikipedia.org)