Mutiply 71 by 79.

Answer

To multiply 71 by 79, we can follow these steps:

### Step 1: Write the numbers vertically
```
71
× 79
```

### Step 2: Multiply the units digit of the second number (9) by the first number (71)
- \( 9 \times 1 = 9 \)
- \( 9 \times 7 = 63 \)

So, we write down 63 and 9:
```
71
× 79
______
639 (This is 71 × 9)
```

### Step 3: Multiply the tens digit of the second number (7) by the first number (71)
- \( 7 \times 1 = 7 \)
- \( 7 \times 7 = 49 \)

Since this is the tens place, we need to add a zero to the right:
```
71
× 79
______
639
+ 4970 (This is 71 × 70, shifted one place to the left)
```

### Step 4: Add the two results together
```
639
+ 4970
______
5609
```

Thus, \( 71 \times 79 = 5609 \).

### Final Answer:
The product of 71 and 79 is **5609**.

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