We look at the division of 642387 by 79 
Let's see how many times 79 fits into 642387.

Advancing to step 1:
If we divide 6 by 79, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 79

Moving on to step 2:
If we divide 64 by 79, we get 0 and a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Append the next digit (2) from the dividend to 64 and continue with: 642 / 79

Advancing to step 3:
79 can be fit into 642 8 times, resulting in a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 632 from 642 to get 10.
Include the next digit (3) from the dividend after 10, then repeat: 103 / 79

On to step 4:
When dividing 103 by 79, we get 1 with a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
If we subtract 79 from 103, we get 24.
Fetch the next digit (8) from the dividend, attach it to 24 and continue: 248 / 79

Moving on to step 5:
79 goes into 248 3 times with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 813.0
Deduct 237 from 248 and we're left with 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 79

Advancing to step 6:
If we divide 117 by 79, we get 1 and a remainder of 38.
The next digit of our result is 1. 
Result so far: 8131.0
Deduct 79 from 117 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
The number 79 fits into 380 4 times, leaving a remainder of 64.
The next digit of our result is 4. 
Result so far: 8131.4
If we subtract 316 from 380, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 8:
79 can be fit into 640 8 times, resulting in a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 8131.48
If we take 632 away from 640, 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.

On to step 9:
If we divide 80 by 79, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 8131.481
The remainder is 1 after subtracting 79 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 10:
10 divided by 79 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 8131.481
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
The number 79 fits into 100 1 times, leaving a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 8131.48101
Subtract 79 from 100 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 12:
79 can be fit into 210 2 times, resulting in a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 8131.481012
The remainder is 52 after subtracting 158 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 13:
79 can be fit into 520 6 times, resulting in a remainder of 46.
Record the quotient 6 as the next digit in the result. 
Result so far: 8131.4810126
If we take 474 away from 520, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 14:
The number 79 fits into 460 5 times, leaving a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 8131.48101265
Subtract 395 from 460 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

In conclusion, the division gives 8131.48101265 with a balance of 6.5e-08.