Explain to your instructor how to simplify the expression below.?

First of all, the equation can be written like this to better explain:

3 * x * 3 * y * 4 * 2 * x * 2 * y * 6

Multiply the numbers first:

3 * 3 * 4 * 2 * 2 * 6 = 864

Then multiply the variables:

x * x = x^2

y * y = y^2

Now put it all together:

864 * x^2 * y^2

Perhaps the expressions are (3x3y^4)(2x2y^6). In that case, product will be 36x^2y10. If the expression is (3.3y^4) ( 2.2y^6), then answer will be 36y^10