We look at the division of 66253123 by 869 
Our goal is to divide 66253123 by 869.

Advancing to step 1:
869 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 869

On to step 2:
If we divide 66 by 869, we get 0 and a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 869

Moving on to step 3:
662 divided by 869 is 0 with a remainder of 662.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 662, we get 662.
Append the next digit (5) from the dividend to 662 and continue with: 6625 / 869

Moving on to step 4:
When dividing 6625 by 869, we get 7 with a remainder of 542.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 6083 away from 6625, we end up with 542.
Append the next digit (3) from the dividend to 542 and continue with: 5423 / 869

Let's proceed to step 5:
5423 divided by 869 is 6 with a remainder of 209.
The next digit of our result is 6. 
Result so far: 76.0
If we take 5214 away from 5423, we end up with 209.
Grab the next digit (1) from the dividend, add it to 209, then carry on: 2091 / 869

Let's proceed to step 6:
869 can be fit into 2091 2 times, resulting in a remainder of 353.
The number 2 becomes the next digit in our result. 
Result so far: 762.0
The remainder is 353 after subtracting 1738 from 2091.
Bring next digit (2) of the dividend behind the 353 and repeat the process: 3532 / 869

Let's proceed to step 7:
869 goes into 3532 4 times with a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 7624.0
If we subtract 3476 from 3532, we get 56.
Take the next digit (3) from the dividend and append it to 56, then repeat: 563 / 869

Moving on to step 8:
869 can be fit into 563 0 times, resulting in a remainder of 563.
Record the quotient 0 as the next digit in the result. 
Result so far: 76240.0
If we take 0 away from 563, we end up with 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Let's proceed to step 9:
When dividing 5630 by 869, we get 6 with a remainder of 416.
Write down 6 as next digit of the result. 
Result so far: 76240.6
If we take 5214 away from 5630, we end up with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 10:
4160 divided by 869 is 4 with a remainder of 684.
Record the quotient 4 as the next digit in the result. 
Result so far: 76240.64
Subtract 3476 from 4160 to get 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Going ahead to step 11:
869 goes into 6840 7 times with a remainder of 757.
The next digit of our result is 7. 
Result so far: 76240.647
Subtracting 6083 from 6840 leaves us with 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7570, and continue the process.

On to step 12:
The number 869 fits into 7570 8 times, leaving a remainder of 618.
The next digit of our result is 8. 
Result so far: 76240.6478
Subtract 6952 from 7570 to get 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Going ahead to step 13:
The number 869 fits into 6180 7 times, leaving a remainder of 97.
Put 7 as the next digit of the answer. 
Result so far: 76240.64787
The remainder is 97 after subtracting 6083 from 6180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Moving on to step 14:
If we divide 970 by 869, we get 1 and a remainder of 101.
Write down 1 as next digit of the result. 
Result so far: 76240.647871
If we take 869 away from 970, we end up with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Advancing to step 15:
If we divide 1010 by 869, we get 1 and a remainder of 141.
Use 1 as the next digit of our solution. 
Result so far: 76240.6478711
If we take 869 away from 1010, we end up with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

The final outcome is 76240.6478711, with a leftover of 1.41e-06.