We divide 669138 by 86
We want to divide 669138 by 86.

On to step 1:
86 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 86

Advancing to step 2:
If we divide 66 by 86, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 86

Going ahead to step 3:
If we divide 669 by 86, we get 7 and a remainder of 67.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 602 from 669 to get 67.
Include the next digit (1) from the dividend after 67, then repeat: 671 / 86

Going ahead to step 4:
If we divide 671 by 86, we get 7 and a remainder of 69.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
If we subtract 602 from 671, we get 69.
Grab the next digit (3) from the dividend, add it to 69, then carry on: 693 / 86

Moving on to step 5:
When dividing 693 by 86, we get 8 with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 778.0
Deduct 688 from 693 and we're left with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 86

Step 6:
When dividing 58 by 86, we get 0 with a remainder of 58.
The next digit of our result is 0. 
Result so far: 7780.0
The remainder is 58 after subtracting 0 from 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 7:
580 divided by 86 is 6 with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 7780.6
Deduct 516 from 580 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 8:
When dividing 640 by 86, we get 7 with a remainder of 38.
The next digit of our result is 7. 
Result so far: 7780.67
If we take 602 away from 640, we end up 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.

Advancing to step 9:
When dividing 380 by 86, we get 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 7780.674
Deduct 344 from 380 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 10:
If we divide 360 by 86, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 7780.6744
The remainder is 16 after subtracting 344 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 7780.6744, with a leftover of 0.00016.