Can a decimal multiplied by another decimal ever equal an integer?

Question

Any decimal number between 0 and infinity that multiplied by itself or another decimal number. Like 0.4 times 0.25, 2.425 times 2.425 and so on.

Answer 1

Yes, $\sqrt{2} \cdot \sqrt{2} = 2$.

Answer 2

Yes. $0.\overline 6\cdot 1.5=\frac23\cdot \frac32=1$.

Answer 3

Take a $2$ rationals: $\dfrac{4}{3} = 1.3333...$, and its reciprocal $\dfrac{3}{4} = 0.75$, what is their product ?

Answer 4

Since nobody has given example where both terminate:

$$2.5\times 0.4=1$$

Answer 5

A tad tongue in cheek:

$$2.0 \times 3.0 = 6$$