We divide 86421393 by 310
Our goal is to divide 86421393 by 310.

Advancing to step 1:
8 divided by 310 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 310

Let's proceed to step 2:
If we divide 86 by 310, we get 0 and a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Bring next digit (4) of the dividend behind the 86 and repeat the process: 864 / 310

On to step 3:
864 divided by 310 is 2 with a remainder of 244.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 620 from 864 leaves us with 244.
Bring next digit (2) of the dividend behind the 244 and repeat the process: 2442 / 310

Moving on to step 4:
310 goes into 2442 7 times with a remainder of 272.
Put 7 as the next digit of the answer. 
Result so far: 27.0
The remainder is 272 after subtracting 2170 from 2442.
Take the next digit (1) from the dividend and append it to 272, then repeat: 2721 / 310

Let's proceed to step 5:
When dividing 2721 by 310, we get 8 with a remainder of 241.
Record the quotient 8 as the next digit in the result. 
Result so far: 278.0
Deduct 2480 from 2721 and we're left with 241.
Append the next digit (3) from the dividend to 241 and continue with: 2413 / 310

Step 6:
310 goes into 2413 7 times with a remainder of 243.
Put 7 as the next digit of the answer. 
Result so far: 2787.0
If we subtract 2170 from 2413, we get 243.
Fetch the next digit (9) from the dividend, attach it to 243 and continue: 2439 / 310

Going ahead to step 7:
2439 divided by 310 is 7 with a remainder of 269.
Write down 7 as next digit of the result. 
Result so far: 27877.0
If we subtract 2170 from 2439, we get 269.
Include the next digit (3) from the dividend after 269, then repeat: 2693 / 310

Let's proceed to step 8:
The number 310 fits into 2693 8 times, leaving a remainder of 213.
Use 8 as the next digit of our solution. 
Result so far: 278778.0
Deduct 2480 from 2693 and we're left with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Step 9:
The number 310 fits into 2130 6 times, leaving a remainder of 270.
Record the quotient 6 as the next digit in the result. 
Result so far: 278778.6
Subtracting 1860 from 2130 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Going ahead to step 10:
The number 310 fits into 2700 8 times, leaving a remainder of 220.
Record the quotient 8 as the next digit in the result. 
Result so far: 278778.68
Deduct 2480 from 2700 and we're left 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 11:
The number 310 fits into 2200 7 times, leaving a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 278778.687
Subtract 2170 from 2200 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 12:
If we divide 300 by 310, we get 0 and a remainder of 300.
The number 0 becomes the next digit in our result. 
Result so far: 278778.687
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 13:
When dividing 3000 by 310, we get 9 with a remainder of 210.
Write down 9 as next digit of the result. 
Result so far: 278778.68709
If we subtract 2790 from 3000, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 14:
310 goes into 2100 6 times with a remainder of 240.
Record the quotient 6 as the next digit in the result. 
Result so far: 278778.687096
If we subtract 1860 from 2100, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 15:
310 can be fit into 2400 7 times, resulting in a remainder of 230.
Use 7 as the next digit of our solution. 
Result so far: 278778.6870967
If we take 2170 away from 2400, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 16:
When dividing 2300 by 310, we get 7 with a remainder of 130.
The number 7 becomes the next digit in our result. 
Result so far: 278778.68709677
Subtracting 2170 from 2300 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Our division results in 278778.68709677 with a remaining 1.3e-07.