The problem asks to multiply the expression $36x$ by $63y$.

1. Problem Description

The problem asks to multiply the expression $36x$ by $63y$.

2. Solution Steps

To multiply $36x$ by $63y$, we multiply the coefficients and the variables separately.

$36x \times 63y = (36 \times 63) \times (x \times y)$

First, we multiply the coefficients:

$36 \times 63 = 2268$

Then, we multiply the variables:

$x \times y = xy$

Combining these results, we get:

$36x \times 63y = 2268xy$

3. Final Answer

The final answer is $2268xy$.