We look at the division of 86421339 by 598 
We're looking to find how many times 598 goes into 86421339.

Going ahead to step 1:
8 divided by 598 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 598

On to step 2:
The number 598 fits into 86 0 times, leaving a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (4) from the dividend after 86, then repeat: 864 / 598

On to step 3:
The number 598 fits into 864 1 times, leaving a remainder of 266.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 598 from 864, we get 266.
Append the next digit (2) from the dividend to 266 and continue with: 2662 / 598

Step 4:
The number 598 fits into 2662 4 times, leaving a remainder of 270.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we subtract 2392 from 2662, we get 270.
Include the next digit (1) from the dividend after 270, then repeat: 2701 / 598

Advancing to step 5:
If we divide 2701 by 598, we get 4 and a remainder of 309.
Put 4 as the next digit of the answer. 
Result so far: 144.0
The remainder is 309 after subtracting 2392 from 2701.
Append the next digit (3) from the dividend to 309 and continue with: 3093 / 598

Moving on to step 6:
When dividing 3093 by 598, we get 5 with a remainder of 103.
The number 5 becomes the next digit in our result. 
Result so far: 1445.0
Subtract 2990 from 3093 to get 103.
Include the next digit (3) from the dividend after 103, then repeat: 1033 / 598

Let's proceed to step 7:
The number 598 fits into 1033 1 times, leaving a remainder of 435.
Put 1 as the next digit of the answer. 
Result so far: 14451.0
Deduct 598 from 1033 and we're left with 435.
Fetch the next digit (9) from the dividend, attach it to 435 and continue: 4359 / 598

Let's proceed to step 8:
4359 divided by 598 is 7 with a remainder of 173.
The next digit of our result is 7. 
Result so far: 144517.0
If we subtract 4186 from 4359, we get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Let's proceed to step 9:
When dividing 1730 by 598, we get 2 with a remainder of 534.
Write down 2 as next digit of the result. 
Result so far: 144517.2
Deduct 1196 from 1730 and we're left with 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Moving on to step 10:
5340 divided by 598 is 8 with a remainder of 556.
Put 8 as the next digit of the answer. 
Result so far: 144517.28
If we subtract 4784 from 5340, we get 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

On to step 11:
When dividing 5560 by 598, we get 9 with a remainder of 178.
Use 9 as the next digit of our solution. 
Result so far: 144517.289
Deduct 5382 from 5560 and we're left with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 12:
When dividing 1780 by 598, we get 2 with a remainder of 584.
Use 2 as the next digit of our solution. 
Result so far: 144517.2892
The remainder is 584 after subtracting 1196 from 1780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

On to step 13:
When dividing 5840 by 598, we get 9 with a remainder of 458.
The number 9 becomes the next digit in our result. 
Result so far: 144517.28929
If we subtract 5382 from 5840, we get 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

On to step 14:
If we divide 4580 by 598, we get 7 and a remainder of 394.
The next digit of our result is 7. 
Result so far: 144517.289297
The remainder is 394 after subtracting 4186 from 4580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Going ahead to step 15:
When dividing 3940 by 598, we get 6 with a remainder of 352.
Use 6 as the next digit of our solution. 
Result so far: 144517.2892976
If we take 3588 away from 3940, we end up with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Moving on to step 16:
If we divide 3520 by 598, we get 5 and a remainder of 530.
Write down 5 as next digit of the result. 
Result so far: 144517.28929765
If we subtract 2990 from 3520, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

The quotient of the division is 144517.28929765, and the remainder is 5.3e-07.