We're dividing 66240565 by 831 
Our goal is to divide 66240565 by 831.

Advancing to step 1:
6 divided by 831 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 831

Step 2:
The number 831 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 831

Step 3:
When dividing 662 by 831, we get 0 with a remainder of 662.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 662 and we're left with 662.
Take the next digit (4) from the dividend and append it to 662, then repeat: 6624 / 831

On to step 4:
831 goes into 6624 7 times with a remainder of 807.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 5817 from 6624, we get 807.
Grab the next digit (0) from the dividend, add it to 807, then carry on: 8070 / 831

Going ahead to step 5:
When dividing 8070 by 831, we get 9 with a remainder of 591.
The number 9 becomes the next digit in our result. 
Result so far: 79.0
Deduct 7479 from 8070 and we're left with 591.
Fetch the next digit (5) from the dividend, attach it to 591 and continue: 5915 / 831

Step 6:
When dividing 5915 by 831, we get 7 with a remainder of 98.
The number 7 becomes the next digit in our result. 
Result so far: 797.0
The remainder is 98 after subtracting 5817 from 5915.
Bring next digit (6) of the dividend behind the 98 and repeat the process: 986 / 831

Step 7:
831 can be fit into 986 1 times, resulting in a remainder of 155.
The number 1 becomes the next digit in our result. 
Result so far: 7971.0
Subtract 831 from 986 to get 155.
Include the next digit (5) from the dividend after 155, then repeat: 1555 / 831

Step 8:
831 can be fit into 1555 1 times, resulting in a remainder of 724.
Record the quotient 1 as the next digit in the result. 
Result so far: 79711.0
The remainder is 724 after subtracting 831 from 1555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Moving on to step 9:
831 goes into 7240 8 times with a remainder of 592.
The next digit of our result is 8. 
Result so far: 79711.8
Deduct 6648 from 7240 and we're left with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Step 10:
When dividing 5920 by 831, we get 7 with a remainder of 103.
The next digit of our result is 7. 
Result so far: 79711.87
If we subtract 5817 from 5920, we get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

On to step 11:
The number 831 fits into 1030 1 times, leaving a remainder of 199.
Use 1 as the next digit of our solution. 
Result so far: 79711.871
If we subtract 831 from 1030, we get 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Let's proceed to step 12:
If we divide 1990 by 831, we get 2 and a remainder of 328.
The next digit of our result is 2. 
Result so far: 79711.8712
Subtracting 1662 from 1990 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 13:
3280 divided by 831 is 3 with a remainder of 787.
Use 3 as the next digit of our solution. 
Result so far: 79711.87123
If we subtract 2493 from 3280, we get 787.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7870, and continue the process.

Let's proceed to step 14:
7870 divided by 831 is 9 with a remainder of 391.
The next digit of our result is 9. 
Result so far: 79711.871239
Subtract 7479 from 7870 to get 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Moving on to step 15:
831 goes into 3910 4 times with a remainder of 586.
Put 4 as the next digit of the answer. 
Result so far: 79711.8712394
If we subtract 3324 from 3910, we get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

On to step 16:
If we divide 5860 by 831, we get 7 and a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 79711.87123947
The remainder is 43 after subtracting 5817 from 5860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

After the division, we end up with 79711.87123947 and a remainder of 4.3e-08.