66516131 divided by 171 
Our goal is to divide 66516131 by 171.

On to step 1:
6 divided by 171 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 171

Going ahead to step 2:
When dividing 66 by 171, we get 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Bring next digit (5) of the dividend behind the 66 and repeat the process: 665 / 171

Let's proceed to step 3:
The number 171 fits into 665 3 times, leaving a remainder of 152.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 513 from 665 and we're left with 152.
Take the next digit (1) from the dividend and append it to 152, then repeat: 1521 / 171

Going ahead to step 4:
If we divide 1521 by 171, we get 8 and a remainder of 153.
The next digit of our result is 8. 
Result so far: 38.0
Subtract 1368 from 1521 to get 153.
Fetch the next digit (6) from the dividend, attach it to 153 and continue: 1536 / 171

Step 5:
171 can be fit into 1536 8 times, resulting in a remainder of 168.
Write down 8 as next digit of the result. 
Result so far: 388.0
The remainder is 168 after subtracting 1368 from 1536.
Append the next digit (1) from the dividend to 168 and continue with: 1681 / 171

Going ahead to step 6:
1681 divided by 171 is 9 with a remainder of 142.
Write down 9 as next digit of the result. 
Result so far: 3889.0
Subtract 1539 from 1681 to get 142.
Grab the next digit (3) from the dividend, add it to 142, then carry on: 1423 / 171

Going ahead to step 7:
1423 divided by 171 is 8 with a remainder of 55.
Put 8 as the next digit of the answer. 
Result so far: 38898.0
If we subtract 1368 from 1423, we get 55.
Grab the next digit (1) from the dividend, add it to 55, then carry on: 551 / 171

Let's proceed to step 8:
171 can be fit into 551 3 times, resulting in a remainder of 38.
Use 3 as the next digit of our solution. 
Result so far: 388983.0
The remainder is 38 after subtracting 513 from 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 9:
The number 171 fits into 380 2 times, leaving a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 388983.2
If we take 342 away from 380, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
171 goes into 380 2 times with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 388983.22
The remainder is 38 after subtracting 342 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

After the division, we end up with 388983.22 and a remainder of 0.038.