What number multiplied by itself equals 644?

Here we will answer: What number multiplied by itself gives 644? In other words, what number times itself will equal 644?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 644
x ≈ 25.377

Square Root Method:
Take the square root of 644 to get the answer:

√644 ≈ 25.377

Exponent Method:
Make the base 644 and the exponent 0.5 to get the answer:

644^0.5 ≈ 25.377

There you go! Now you know how to calculate "What number multiplied by itself equals 644?"

The bottom line is that 25.377 times itself equals approximately 644 as illustrated here:

25.377 x 25.377 ≈ 644

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The answer on this page is rounded to the nearest thousandth, if necessary.