Step 1: Rewrite the expression using fractions.
441÷686×686÷441=686441×441686
Step 2: Multiply the fractions.
When multiplying fractions, multiply the numerators and the denominators.
686441×441686=686×441441×686
Step 3: Simplify the expression.
Since the numerator and the denominator are the same, the fraction simplifies to 1.
686×441441×686=1
The final answer is 1.
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