To solve the equation \((x - 36) / 18 = 12\), follow these steps:

1. **Isolate the term involving \(x\)**:
\[
\frac{x - 36}{18} = 12
\]

2. **Multiply both sides by 18** to eliminate the denominator:
\[
x - 36 = 12 \times 18
\]

3. **Calculate \(12 \times 18\)**:
\[
12 \times 18 = 216
\]

4. **Rewrite the equation**:
\[
x - 36 = 216
\]

5. **Add 36 to both sides** to solve for \(x\):
\[
x = 216 + 36
\]

6. **Calculate the sum**:
\[
x = 252
\]

So, the solution to the equation \((x - 36) / 18 = 12\) is:
\[
x = 252
\]