Why ordinary calculators fall short
Standard calculators store numbers as 64-bit floating point, which keeps only about 15 to 17 significant digits. Beyond that, digits are silently rounded, so 123456789012345678 may come back ending in zeros that were never part of the answer.
This tool instead uses arbitrary-precision integer arithmetic (BigInt). It allocates as many digits as the result needs, so every digit is exact no matter how large the numbers grow.
How each operation behaves
Addition, subtraction, and multiplication work exactly as you would expect on whole numbers. Division, modulo, and powers follow integer rules.
- Division truncates toward zero and discards any remainder — 7 ÷ 2 gives 3, not 3.5.
- Modulo returns the remainder left after that integer division.
- Power raises the first number to the second; the exponent must be zero or a positive whole number.
Tips and common mistakes
Because the inputs are whole numbers only, leading zeros, decimal points, or thousands separators will be rejected. Enter digits with at most a single leading minus sign.
- Avoid dividing by zero — it is undefined and the calculator will stop you.
- A very large exponent can produce an answer with millions of digits and take time to display.
- If you need fractional results, divide manually using the remainder from modulo, or use a decimal-capable calculator.
Formula
result = a (op) b, computed with arbitrary-precision integersFrequently asked questions
- Can I use decimals?
- No. BigInt supports whole numbers only. Division and modulo therefore use integer arithmetic.