Evaluate:
`15. 848 div 40`

Answer

To evaluate \( 15.848 \div 40 \), we will follow these steps:

### Step 1: Set up the division
We write \( 15.848 \) as the dividend and \( 40 \) as the divisor.

### Step 2: Determine how many times 40 fits into 15
Since \( 40 \) is greater than \( 15 \), it fits \( 0 \) times. We write \( 0 \) above the division line.

### Step 3: Place the decimal point
Since we have a decimal in the dividend, we place the decimal point in the quotient directly above the decimal point in the dividend.

### Step 4: Bring down the next digit
Now we consider \( 158 \) (the next digits after the decimal). We find how many times \( 40 \) fits into \( 158 \).

### Step 5: Calculate how many times 40 fits into 158
\( 40 \times 3 = 120 \). So, \( 40 \) fits into \( 158 \) a total of \( 3 \) times.

### Step 6: Subtract and bring down the next digit
Subtract \( 120 \) from \( 158 \):
\[ 158 - 120 = 38 \]
Now, bring down the next digit \( 4 \) to make it \( 384 \).

### Step 7: Determine how many times 40 fits into 384
Now we find how many times \( 40 \) fits into \( 384 \):
\[ 40 \times 9 = 360 \]
So, \( 40 \) fits into \( 384 \) a total of \( 9 \) times.

### Step 8: Subtract again
Subtract \( 360 \) from \( 384 \):
\[ 384 - 360 = 24 \]
Now, bring down the next digit \( 8 \) to make it \( 248 \).

### Step 9: Determine how many times 40 fits into 248
Now we find how many times \( 40 \) fits into \( 248 \):
\[ 40 \times 6 = 240 \]
So, \( 40 \) fits into \( 248 \) a total of \( 6 \) times.

### Step 10: Final subtraction
Subtract \( 240 \) from \( 248 \):
\[ 248 - 240 = 8 \]
Now, we can bring down another \( 0 \) (to make it \( 80 \)) since we are working with decimals.

### Step 11: Determine how many times 40 fits into 80
Now we find how many times \( 40 \) fits into \( 80 \):
\[ 40 \times 2 = 80 \]
So, \( 40 \) fits into \( 80 \) a total of \( 2 \) times.

### Step 12: Final subtraction
Subtract \( 80 \) from \( 80 \):
\[ 80 - 80 = 0 \]
There is no remainder.

### Final Answer
Thus, the result of \( 15.848 \div 40 \) is \( 0.3962 \).

---