Twisted Restraints

Geometry Level 3

The above shows a rectangle $$ABCD$$ with an area of 672, a diagonal $$CB$$ of length 42.
Given that $$AE \perp CB$$ and $$DF \perp CB$$, find $$CE$$.

Give your answer to 1 decimal place.

You may use a calculator for the final step of your calculation.

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