We look at the division of 86634973 by 390 
Our goal is to divide 86634973 by 390.

Moving on to step 1:
390 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 390

Going ahead to step 2:
When dividing 86 by 390, we get 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Bring next digit (6) of the dividend behind the 86 and repeat the process: 866 / 390

On to step 3:
If we divide 866 by 390, we get 2 and a remainder of 86.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 780 from 866 and we're left with 86.
Take the next digit (3) from the dividend and append it to 86, then repeat: 863 / 390

Moving on to step 4:
863 divided by 390 is 2 with a remainder of 83.
Write down 2 as next digit of the result. 
Result so far: 22.0
Deduct 780 from 863 and we're left with 83.
Grab the next digit (4) from the dividend, add it to 83, then carry on: 834 / 390

On to step 5:
390 goes into 834 2 times with a remainder of 54.
The next digit of our result is 2. 
Result so far: 222.0
Subtract 780 from 834 to get 54.
Include the next digit (9) from the dividend after 54, then repeat: 549 / 390

Let's proceed to step 6:
The number 390 fits into 549 1 times, leaving a remainder of 159.
The number 1 becomes the next digit in our result. 
Result so far: 2221.0
Subtract 390 from 549 to get 159.
Grab the next digit (7) from the dividend, add it to 159, then carry on: 1597 / 390

Going ahead to step 7:
1597 divided by 390 is 4 with a remainder of 37.
Use 4 as the next digit of our solution. 
Result so far: 22214.0
The remainder is 37 after subtracting 1560 from 1597.
Fetch the next digit (3) from the dividend, attach it to 37 and continue: 373 / 390

Let's proceed to step 8:
390 can be fit into 373 0 times, resulting in a remainder of 373.
Use 0 as the next digit of our solution. 
Result so far: 222140.0
Subtracting 0 from 373 leaves us with 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Step 9:
The number 390 fits into 3730 9 times, leaving a remainder of 220.
Use 9 as the next digit of our solution. 
Result so far: 222140.9
If we take 3510 away from 3730, 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.

Step 10:
If we divide 2200 by 390, we get 5 and a remainder of 250.
The number 5 becomes the next digit in our result. 
Result so far: 222140.95
If we subtract 1950 from 2200, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Step 11:
The number 390 fits into 2500 6 times, leaving a remainder of 160.
Use 6 as the next digit of our solution. 
Result so far: 222140.956
If we subtract 2340 from 2500, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 12:
390 goes into 1600 4 times with a remainder of 40.
The next digit of our result is 4. 
Result so far: 222140.9564
Subtracting 1560 from 1600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 13:
390 goes into 400 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 222140.95641
The remainder is 10 after subtracting 390 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
If we divide 100 by 390, we get 0 and a remainder of 100.
The number 0 becomes the next digit in our result. 
Result so far: 222140.95641
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 15:
390 can be fit into 1000 2 times, resulting in a remainder of 220.
Record the quotient 2 as the next digit in the result. 
Result so far: 222140.9564102
The remainder is 220 after subtracting 780 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 16:
If we divide 2200 by 390, we get 5 and a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 222140.95641025
If we take 1950 away from 2200, we end up with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

The final result is 222140.95641025 with a remainder of 2.5e-07.