Find the unit digit of `135xx361xx970`.

Explanation

To find the unit digit of the expression \(135 \times 361 \times 970\), we can follow these steps:

### Step 1: Identify the unit digits of each number
- The unit digit of \(135\) is \(5\).
- The unit digit of \(361\) is \(1\).
- The unit digit of \(970\) is \(0\).

### Step 2: Multiply the unit digits
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