87139369 divided by 531 
Our goal is to divide 87139369 by 531.

Going ahead to step 1:
531 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 531

Advancing to step 2:
531 can be fit into 87 0 times, resulting in a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 87, we get 87.
Bring next digit (1) of the dividend behind the 87 and repeat the process: 871 / 531

On to step 3:
The number 531 fits into 871 1 times, leaving a remainder of 340.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 340 after subtracting 531 from 871.
Fetch the next digit (3) from the dividend, attach it to 340 and continue: 3403 / 531

Let's proceed to step 4:
The number 531 fits into 3403 6 times, leaving a remainder of 217.
Use 6 as the next digit of our solution. 
Result so far: 16.0
Subtract 3186 from 3403 to get 217.
Take the next digit (9) from the dividend and append it to 217, then repeat: 2179 / 531

Let's proceed to step 5:
2179 divided by 531 is 4 with a remainder of 55.
The number 4 becomes the next digit in our result. 
Result so far: 164.0
If we take 2124 away from 2179, we end up with 55.
Fetch the next digit (3) from the dividend, attach it to 55 and continue: 553 / 531

On to step 6:
531 can be fit into 553 1 times, resulting in a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 1641.0
Subtracting 531 from 553 leaves us with 22.
Take the next digit (6) from the dividend and append it to 22, then repeat: 226 / 531

Let's proceed to step 7:
When dividing 226 by 531, we get 0 with a remainder of 226.
Record the quotient 0 as the next digit in the result. 
Result so far: 16410.0
Subtracting 0 from 226 leaves us with 226.
Grab the next digit (9) from the dividend, add it to 226, then carry on: 2269 / 531

On to step 8:
The number 531 fits into 2269 4 times, leaving a remainder of 145.
Record the quotient 4 as the next digit in the result. 
Result so far: 164104.0
Subtract 2124 from 2269 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Let's proceed to step 9:
If we divide 1450 by 531, we get 2 and a remainder of 388.
Use 2 as the next digit of our solution. 
Result so far: 164104.2
If we take 1062 away from 1450, we end up with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Let's proceed to step 10:
The number 531 fits into 3880 7 times, leaving a remainder of 163.
Use 7 as the next digit of our solution. 
Result so far: 164104.27
Subtracting 3717 from 3880 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

On to step 11:
If we divide 1630 by 531, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 164104.273
If we take 1593 away from 1630, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 12:
If we divide 370 by 531, we get 0 and a remainder of 370.
Put 0 as the next digit of the answer. 
Result so far: 164104.273
Subtract 0 from 370 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 13:
3700 divided by 531 is 6 with a remainder of 514.
The number 6 becomes the next digit in our result. 
Result so far: 164104.27306
Subtracting 3186 from 3700 leaves us with 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Let's proceed to step 14:
When dividing 5140 by 531, we get 9 with a remainder of 361.
Put 9 as the next digit of the answer. 
Result so far: 164104.273069
Deduct 4779 from 5140 and we're left with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

On to step 15:
531 goes into 3610 6 times with a remainder of 424.
Record the quotient 6 as the next digit in the result. 
Result so far: 164104.2730696
If we take 3186 away from 3610, we end up with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Step 16:
531 can be fit into 4240 7 times, resulting in a remainder of 523.
The next digit of our result is 7. 
Result so far: 164104.27306967
Subtracting 3717 from 4240 leaves us with 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

The final outcome is 164104.27306967, with a leftover of 5.23e-07.