638816 ÷ 86 
Our goal is to divide 638816 by 86.

Moving on to step 1:
If we divide 6 by 86, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 86

Let's proceed to step 2:
63 divided by 86 is 0 with a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Bring next digit (8) of the dividend behind the 63 and repeat the process: 638 / 86

Going ahead to step 3:
86 goes into 638 7 times with a remainder of 36.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 602 away from 638, we end up with 36.
Grab the next digit (8) from the dividend, add it to 36, then carry on: 368 / 86

Let's proceed to step 4:
The number 86 fits into 368 4 times, leaving a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
If we take 344 away from 368, we end up with 24.
Append the next digit (1) from the dividend to 24 and continue with: 241 / 86

Moving on to step 5:
If we divide 241 by 86, we get 2 and a remainder of 69.
Put 2 as the next digit of the answer. 
Result so far: 742.0
Deduct 172 from 241 and we're left with 69.
Fetch the next digit (6) from the dividend, attach it to 69 and continue: 696 / 86

Let's proceed to step 6:
The number 86 fits into 696 8 times, leaving a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 7428.0
If we take 688 away from 696, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 7:
If we divide 80 by 86, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 7428.0
Subtracting 0 from 80 leaves us with 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 8:
If we divide 800 by 86, we get 9 and a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 7428.09
If we take 774 away from 800, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 9:
260 divided by 86 is 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 7428.093
Subtracting 258 from 260 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 10:
20 divided by 86 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 7428.093
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
200 divided by 86 is 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 7428.09302
Subtracting 172 from 200 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 12:
280 divided by 86 is 3 with a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 7428.093023
Deduct 258 from 280 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
If we divide 220 by 86, we get 2 and a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 7428.0930232
Subtracting 172 from 220 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
86 goes into 480 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 7428.09302325
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 7428.09302325, with a leftover of 5e-08.