Multiply :
`3.45 xx17`

Answer

To solve the multiplication of 3.45 by 17, follow these steps:

### Step 1: Remove the Decimal
First, we convert 3.45 into a whole number by removing the decimal. Since there are two decimal places in 3.45, we can express it as:
\[ 3.45 = \frac{345}{100} \]
So, we can rewrite the multiplication as:
\[ 3.45 \times 17 = \frac{345}{100} \times 17 \]

### Step 2: Multiply the Whole Numbers
Next, we multiply 345 by 17. We can do this using the standard multiplication method:
```
345
x 17
______
2415 (This is 345 multiplied by 7)
+ 3450 (This is 345 multiplied by 10, shifted one position to the left)
______
5865
```

### Step 3: Combine the Results
Now we add the results from the multiplication:
\[ 2415 + 3450 = 5865 \]

### Step 4: Divide by 100
Since we initially removed the decimal by multiplying by 100, we need to divide our result by 100 to place the decimal back:
\[ \frac{5865}{100} = 58.65 \]

### Final Answer
Thus, the final answer to the multiplication of 3.45 by 17 is:
\[ \boxed{58.65} \]

---