58131231 ÷ 648 
We're looking to find how many times 648 goes into 58131231.

Going ahead to step 1:
When dividing 5 by 648, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 648

Step 2:
648 goes into 58 0 times with a remainder of 58.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 58 after subtracting 0 from 58.
Append the next digit (1) from the dividend to 58 and continue with: 581 / 648

On to step 3:
648 can be fit into 581 0 times, resulting in a remainder of 581.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 581, we end up with 581.
Fetch the next digit (3) from the dividend, attach it to 581 and continue: 5813 / 648

Let's proceed to step 4:
The number 648 fits into 5813 8 times, leaving a remainder of 629.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 5184 away from 5813, we end up with 629.
Bring next digit (1) of the dividend behind the 629 and repeat the process: 6291 / 648

Going ahead to step 5:
6291 divided by 648 is 9 with a remainder of 459.
The next digit of our result is 9. 
Result so far: 89.0
If we take 5832 away from 6291, we end up with 459.
Append the next digit (2) from the dividend to 459 and continue with: 4592 / 648

Advancing to step 6:
When dividing 4592 by 648, we get 7 with a remainder of 56.
The next digit of our result is 7. 
Result so far: 897.0
Subtracting 4536 from 4592 leaves us with 56.
Take the next digit (3) from the dividend and append it to 56, then repeat: 563 / 648

Going ahead to step 7:
648 goes into 563 0 times with a remainder of 563.
Put 0 as the next digit of the answer. 
Result so far: 8970.0
If we subtract 0 from 563, we get 563.
Bring next digit (1) of the dividend behind the 563 and repeat the process: 5631 / 648

Step 8:
The number 648 fits into 5631 8 times, leaving a remainder of 447.
The next digit of our result is 8. 
Result so far: 89708.0
If we take 5184 away from 5631, we end up with 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Step 9:
The number 648 fits into 4470 6 times, leaving a remainder of 582.
The number 6 becomes the next digit in our result. 
Result so far: 89708.6
The remainder is 582 after subtracting 3888 from 4470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Moving on to step 10:
5820 divided by 648 is 8 with a remainder of 636.
The next digit of our result is 8. 
Result so far: 89708.68
If we take 5184 away from 5820, we end up with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Step 11:
The number 648 fits into 6360 9 times, leaving a remainder of 528.
Record the quotient 9 as the next digit in the result. 
Result so far: 89708.689
Subtract 5832 from 6360 to get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Going ahead to step 12:
If we divide 5280 by 648, we get 8 and a remainder of 96.
The next digit of our result is 8. 
Result so far: 89708.6898
If we subtract 5184 from 5280, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 13:
The number 648 fits into 960 1 times, leaving a remainder of 312.
Put 1 as the next digit of the answer. 
Result so far: 89708.68981
If we take 648 away from 960, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 14:
When dividing 3120 by 648, we get 4 with a remainder of 528.
The number 4 becomes the next digit in our result. 
Result so far: 89708.689814
If we take 2592 away from 3120, we end up with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 15:
If we divide 5280 by 648, we get 8 and a remainder of 96.
The number 8 becomes the next digit in our result. 
Result so far: 89708.6898148
Deduct 5184 from 5280 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 16:
The number 648 fits into 960 1 times, leaving a remainder of 312.
The number 1 becomes the next digit in our result. 
Result so far: 89708.68981481
The remainder is 312 after subtracting 648 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Our division results in 89708.68981481 with a remaining 3.12e-07.