Can I love you without a calculator?

Algebra Level 2

As the photo above shows, the following equation:

$128\sqrt{e980}$

gives the message "I Love You" when half of it is erased. However, what is the value of $128\sqrt{e980}$ when rounded down to one decimal place?

Photo credits: iblogangela

Details and assumptions: $$e980$$ is defined as $$e\times980$$.

Please try not to use a calculator for this.

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