66251787 ÷ 864 
We want to divide 66251787 by 864.

Advancing to step 1:
The number 864 fits into 6 0 times, leaving 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.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 864

Going ahead to step 2:
If we divide 66 by 864, we get 0 and a remainder of 66.
The next digit of our result is 0. 
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 / 864

On to step 3:
When dividing 662 by 864, we get 0 with a remainder of 662.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 662 and we're left with 662.
Bring next digit (5) of the dividend behind the 662 and repeat the process: 6625 / 864

Going ahead to step 4:
If we divide 6625 by 864, we get 7 and a remainder of 577.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 6048 from 6625 and we're left with 577.
Grab the next digit (1) from the dividend, add it to 577, then carry on: 5771 / 864

Advancing to step 5:
When dividing 5771 by 864, we get 6 with a remainder of 587.
Use 6 as the next digit of our solution. 
Result so far: 76.0
If we subtract 5184 from 5771, we get 587.
Bring next digit (7) of the dividend behind the 587 and repeat the process: 5877 / 864

Advancing to step 6:
If we divide 5877 by 864, we get 6 and a remainder of 693.
Write down 6 as next digit of the result. 
Result so far: 766.0
Subtracting 5184 from 5877 leaves us with 693.
Take the next digit (8) from the dividend and append it to 693, then repeat: 6938 / 864

Moving on to step 7:
The number 864 fits into 6938 8 times, leaving a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 7668.0
If we subtract 6912 from 6938, we get 26.
Bring next digit (7) of the dividend behind the 26 and repeat the process: 267 / 864

Going ahead to step 8:
267 divided by 864 is 0 with a remainder of 267.
Use 0 as the next digit of our solution. 
Result so far: 76680.0
Subtracting 0 from 267 leaves us with 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Step 9:
The number 864 fits into 2670 3 times, leaving a remainder of 78.
The number 3 becomes the next digit in our result. 
Result so far: 76680.3
Subtract 2592 from 2670 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 10:
864 can be fit into 780 0 times, resulting in a remainder of 780.
Put 0 as the next digit of the answer. 
Result so far: 76680.3
If we take 0 away from 780, we end up with 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

Going ahead to step 11:
When dividing 7800 by 864, we get 9 with a remainder of 24.
Record the quotient 9 as the next digit in the result. 
Result so far: 76680.309
Subtract 7776 from 7800 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 12:
The number 864 fits into 240 0 times, leaving a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 76680.309
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 13:
When dividing 2400 by 864, we get 2 with a remainder of 672.
Record the quotient 2 as the next digit in the result. 
Result so far: 76680.30902
If we take 1728 away from 2400, we end up with 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Going ahead to step 14:
The number 864 fits into 6720 7 times, leaving a remainder of 672.
Write down 7 as next digit of the result. 
Result so far: 76680.309027
Subtracting 6048 from 6720 leaves us with 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Advancing to step 15:
864 can be fit into 6720 7 times, resulting in a remainder of 672.
The next digit of our result is 7. 
Result so far: 76680.3090277
The remainder is 672 after subtracting 6048 from 6720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

After the division, we end up with 76680.3090277 and a remainder of 6.72e-06.