**Multiplying 2.2 and 0.225**

To multiply the numbers 2.2 and 0.225, we can follow the standard multiplication method. Let's break down the process step by step.

**Step 1: Arrange the numbers**
Write the numbers one below the other, aligning the decimal points:

```
2.2
x 0.225
```

**Step 2: Ignore the decimal points**
Multiply the numbers as if they were whole numbers:

```
22 (multiply 2.2 by 10)
x 225 (multiply 0.225 by 1000)
------
```

**Step 3: Multiply the numbers**
Multiply the numbers without the decimal points:

```
22
x 225
------
4950
```

**Step 4: Count the decimal places**
In the original numbers, count the total number of decimal places. In this case, we have one decimal place in 2.2 and three decimal places in 0.225.

**Step 5: Place the decimal point**
Count the total number of decimal places in the answer obtained in step 3. In this case, there are four decimal places. Place the decimal point from the right, four places in the answer:

```
22
x 225
------
4.950
```

**Step 6: Significant Figures**
To determine the number of significant figures in the answer, we need to consider the significant figures in the original numbers being multiplied.

In 2.2, there are two significant figures, and in 0.225, there are three significant figures.

The rule for multiplication is that the result should have the same number of significant figures as the original number with the least significant figures. In this case, 2.2 has two significant figures, so the answer should also have two significant figures.

Therefore, the answer to multiplying 2.2 and 0.225, correct to the significant figures, is 4.950.

2.2×0.225=0.495