Overview
This calculator brings the four basic arithmetic operations together in one tool. Enter two numbers, choose an operation, and get the result immediately, with the mathematical expression and division remainder explained.
Formula
Addition: a + b, subtraction: a − b, multiplication: a × b, division: a ÷ b (provided b is not zero).
How it works
Enter the two numbers
Type the first and second numbers. Decimal values are supported.
Choose the operation
Select addition, subtraction, multiplication or division.
Read the result
The result appears instantly; for division, the whole quotient and remainder are also shown.
Worked examples
Example 1: addition
12 + 3 = 15.
Example 2: division with a remainder
17 ÷ 5 = 3 remainder 2, because 5 × 3 + 2 = 17.
Frequently asked questions
Does it support negative numbers?
Yes. You can enter negative or positive numbers, and division follows the usual sign rule for the remainder.
What happens when dividing by zero?
Division by zero is mathematically undefined, so the calculator shows an error instead of an incorrect result.
Is the result approximate?
The result is rounded to ten decimal places. Repeating decimals are therefore shown as approximations.
This calculator is for educational and informational purposes only and is not a substitute for professional advice.