86431117 ÷ 580 
Our goal is to divide 86431117 by 580.

Let's proceed to step 1:
When dividing 8 by 580, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 580

Let's proceed to step 2:
If we divide 86 by 580, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Include the next digit (4) from the dividend after 86, then repeat: 864 / 580

Step 3:
864 divided by 580 is 1 with a remainder of 284.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 580 from 864 and we're left with 284.
Fetch the next digit (3) from the dividend, attach it to 284 and continue: 2843 / 580

On to step 4:
When dividing 2843 by 580, we get 4 with a remainder of 523.
Write down 4 as next digit of the result. 
Result so far: 14.0
Deduct 2320 from 2843 and we're left with 523.
Include the next digit (1) from the dividend after 523, then repeat: 5231 / 580

Moving on to step 5:
The number 580 fits into 5231 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 149.0
Deduct 5220 from 5231 and we're left with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 580

Going ahead to step 6:
111 divided by 580 is 0 with a remainder of 111.
Write down 0 as next digit of the result. 
Result so far: 1490.0
Subtracting 0 from 111 leaves us with 111.
Include the next digit (1) from the dividend after 111, then repeat: 1111 / 580

Moving on to step 7:
When dividing 1111 by 580, we get 1 with a remainder of 531.
The number 1 becomes the next digit in our result. 
Result so far: 14901.0
The remainder is 531 after subtracting 580 from 1111.
Fetch the next digit (7) from the dividend, attach it to 531 and continue: 5317 / 580

Moving on to step 8:
The number 580 fits into 5317 9 times, leaving a remainder of 97.
The number 9 becomes the next digit in our result. 
Result so far: 149019.0
Subtracting 5220 from 5317 leaves us with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Going ahead to step 9:
When dividing 970 by 580, we get 1 with a remainder of 390.
Use 1 as the next digit of our solution. 
Result so far: 149019.1
Subtract 580 from 970 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

On to step 10:
580 can be fit into 3900 6 times, resulting in a remainder of 420.
The number 6 becomes the next digit in our result. 
Result so far: 149019.16
If we take 3480 away from 3900, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Let's proceed to step 11:
The number 580 fits into 4200 7 times, leaving a remainder of 140.
Use 7 as the next digit of our solution. 
Result so far: 149019.167
Subtracting 4060 from 4200 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 12:
580 can be fit into 1400 2 times, resulting in a remainder of 240.
The next digit of our result is 2. 
Result so far: 149019.1672
Deduct 1160 from 1400 and we're left 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.

Moving on to step 13:
580 can be fit into 2400 4 times, resulting in a remainder of 80.
The number 4 becomes the next digit in our result. 
Result so far: 149019.16724
If we subtract 2320 from 2400, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 14:
580 can be fit into 800 1 times, resulting in a remainder of 220.
The number 1 becomes the next digit in our result. 
Result so far: 149019.167241
If we take 580 away from 800, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 15:
When dividing 2200 by 580, we get 3 with a remainder of 460.
Record the quotient 3 as the next digit in the result. 
Result so far: 149019.1672413
If we take 1740 away from 2200, we end up with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 16:
580 can be fit into 4600 7 times, resulting in a remainder of 540.
Write down 7 as next digit of the result. 
Result so far: 149019.16724137
Deduct 4060 from 4600 and we're left with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

After the division, we end up with 149019.16724137 and a remainder of 5.4e-07.