15981588 divided by 408 
Our goal is to divide 15981588 by 408.

Step 1:
408 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 408

Step 2:
If we divide 15 by 408, we get 0 and a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 408

Let's proceed to step 3:
159 divided by 408 is 0 with a remainder of 159.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 159 and we're left with 159.
Grab the next digit (8) from the dividend, add it to 159, then carry on: 1598 / 408

On to step 4:
408 goes into 1598 3 times with a remainder of 374.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 1224 away from 1598, we end up with 374.
Include the next digit (1) from the dividend after 374, then repeat: 3741 / 408

Let's proceed to step 5:
The number 408 fits into 3741 9 times, leaving a remainder of 69.
Write down 9 as next digit of the result. 
Result so far: 39.0
Subtract 3672 from 3741 to get 69.
Take the next digit (5) from the dividend and append it to 69, then repeat: 695 / 408

Step 6:
408 can be fit into 695 1 times, resulting in a remainder of 287.
The next digit of our result is 1. 
Result so far: 391.0
If we take 408 away from 695, we end up with 287.
Take the next digit (8) from the dividend and append it to 287, then repeat: 2878 / 408

Step 7:
2878 divided by 408 is 7 with a remainder of 22.
The number 7 becomes the next digit in our result. 
Result so far: 3917.0
If we subtract 2856 from 2878, we get 22.
Bring next digit (8) of the dividend behind the 22 and repeat the process: 228 / 408

Moving on to step 8:
The number 408 fits into 228 0 times, leaving a remainder of 228.
Use 0 as the next digit of our solution. 
Result so far: 39170.0
Subtract 0 from 228 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 9:
408 goes into 2280 5 times with a remainder of 240.
The number 5 becomes the next digit in our result. 
Result so far: 39170.5
Subtracting 2040 from 2280 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 10:
The number 408 fits into 2400 5 times, leaving a remainder of 360.
Record the quotient 5 as the next digit in the result. 
Result so far: 39170.55
If we subtract 2040 from 2400, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

The quotient of the division is 39170.55, and the remainder is 0.36.