Question 979480
<pre>
{{{matrix(2,15,
"",     "",   "",  "", "", "",  "",  square,       "", "",  "", "",    "",   "", "",
Double, my, value, is, 18, but, my, cross(product),is,"81.","",What, number, am, "I?")}}}

The SQUARE of a number is what you get when you multiply the number
by itself.

So it asks:

What number is such that when you multiply it by 2 you get 18,
and when you multiply it by itself you get 81?

Now you know the answer, right?
Edwin</pre>