Can I love you without a calculator?

Algebra Level 2

As the photo above shows, the following equation:

128e980128\sqrt{e980}

gives the message "I Love You" when half of it is erased. However, what is the value of 128e980128\sqrt{e980} when rounded down to one decimal place?

Photo credits: iblogangela

Details and assumptions: e980e980 is defined as e×980e\times980.

Please try not to use a calculator for this.

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