684÷397−584×397

To solve the expression, we need to follow the order of operations, which is also known as the PEMDAS rule (Parentheses, Exponents, Multiplication and Division from left to right, and Addition and Subtraction from left to right).

Let's break down the expression step by step:

1. 684 ÷ 397: We perform the division first and get approximately 1.7252 (rounded to four decimal places).

2. 584 × 397: Then, we calculate the multiplication and get 231848.

3. Finally, we subtract: 1.7252 - 231848 = -231846.2748 (rounded to four decimal places).

Therefore, the result of the expression 684÷397−584×397 is approximately -231846.2748.