multiplying decimals

If it is a square each side should be the same length. 3.8cm.

For finding area use the formula:

A=b(h)

Area=base(height)

3.8(3.8)=

If the length of one side length of a square is 3.8, then all the sidelengths are 3.8.

Let us use a formula to find the area:

$A=s^2$

$A=3.8^2$

$A=3.8^2\Rightarrow 14.44$

$A=\boxed{14.44\space cm^2}$

Hope that helps!