Let's divide 86399739 by 172
Our goal is to divide 86399739 by 172.

Moving on to step 1:
The number 172 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 172

Step 2:
If we divide 86 by 172, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Grab the next digit (3) from the dividend, add it to 86, then carry on: 863 / 172

Moving on to step 3:
The number 172 fits into 863 5 times, leaving a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 860 from 863 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 172

On to step 4:
If we divide 39 by 172, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 50.0
Subtracting 0 from 39 leaves us with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 172

Advancing to step 5:
399 divided by 172 is 2 with a remainder of 55.
Record the quotient 2 as the next digit in the result. 
Result so far: 502.0
Subtracting 344 from 399 leaves us with 55.
Fetch the next digit (7) from the dividend, attach it to 55 and continue: 557 / 172

Moving on to step 6:
If we divide 557 by 172, we get 3 and a remainder of 41.
Record the quotient 3 as the next digit in the result. 
Result so far: 5023.0
Subtracting 516 from 557 leaves us with 41.
Take the next digit (3) from the dividend and append it to 41, then repeat: 413 / 172

Going ahead to step 7:
If we divide 413 by 172, we get 2 and a remainder of 69.
The number 2 becomes the next digit in our result. 
Result so far: 50232.0
Deduct 344 from 413 and we're left with 69.
Take the next digit (9) from the dividend and append it to 69, then repeat: 699 / 172

Advancing to step 8:
172 goes into 699 4 times with a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 502324.0
Deduct 688 from 699 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
If we divide 110 by 172, we get 0 and a remainder of 110.
Put 0 as the next digit of the answer. 
Result so far: 502324.0
The remainder is 110 after subtracting 0 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Advancing to step 10:
1100 divided by 172 is 6 with a remainder of 68.
Put 6 as the next digit of the answer. 
Result so far: 502324.06
If we subtract 1032 from 1100, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 11:
The number 172 fits into 680 3 times, leaving a remainder of 164.
Use 3 as the next digit of our solution. 
Result so far: 502324.063
The remainder is 164 after subtracting 516 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Moving on to step 12:
1640 divided by 172 is 9 with a remainder of 92.
The number 9 becomes the next digit in our result. 
Result so far: 502324.0639
If we subtract 1548 from 1640, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 13:
920 divided by 172 is 5 with a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 502324.06395
Deduct 860 from 920 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 14:
172 goes into 600 3 times with a remainder of 84.
Use 3 as the next digit of our solution. 
Result so far: 502324.063953
Subtract 516 from 600 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 15:
If we divide 840 by 172, we get 4 and a remainder of 152.
The number 4 becomes the next digit in our result. 
Result so far: 502324.0639534
The remainder is 152 after subtracting 688 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Going ahead to step 16:
If we divide 1520 by 172, we get 8 and a remainder of 144.
The next digit of our result is 8. 
Result so far: 502324.06395348
Subtract 1376 from 1520 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The quotient of the division is 502324.06395348, and the remainder is 1.44e-07.