We're dividing 51312464 by 643 
Let's see how many times 643 fits into 51312464.

Moving on to step 1:
643 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 643

Going ahead to step 2:
The number 643 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 643

On to step 3:
643 goes into 513 0 times with a remainder of 513.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 513 and we're left with 513.
Bring next digit (1) of the dividend behind the 513 and repeat the process: 5131 / 643

Let's proceed to step 4:
643 can be fit into 5131 7 times, resulting in a remainder of 630.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 4501 away from 5131, we end up with 630.
Take the next digit (2) from the dividend and append it to 630, then repeat: 6302 / 643

Step 5:
The number 643 fits into 6302 9 times, leaving a remainder of 515.
Use 9 as the next digit of our solution. 
Result so far: 79.0
Subtracting 5787 from 6302 leaves us with 515.
Fetch the next digit (4) from the dividend, attach it to 515 and continue: 5154 / 643

Moving on to step 6:
If we divide 5154 by 643, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 798.0
If we take 5144 away from 5154, we end up with 10.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 643

On to step 7:
643 can be fit into 106 0 times, resulting in a remainder of 106.
Record the quotient 0 as the next digit in the result. 
Result so far: 7980.0
Subtract 0 from 106 to get 106.
Take the next digit (4) from the dividend and append it to 106, then repeat: 1064 / 643

Let's proceed to step 8:
The number 643 fits into 1064 1 times, leaving a remainder of 421.
The number 1 becomes the next digit in our result. 
Result so far: 79801.0
If we take 643 away from 1064, we end up with 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

Moving on to step 9:
When dividing 4210 by 643, we get 6 with a remainder of 352.
Use 6 as the next digit of our solution. 
Result so far: 79801.6
If we take 3858 away from 4210, we end up with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Step 10:
The number 643 fits into 3520 5 times, leaving a remainder of 305.
Write down 5 as next digit of the result. 
Result so far: 79801.65
If we take 3215 away from 3520, we end up with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

On to step 11:
When dividing 3050 by 643, we get 4 with a remainder of 478.
Write down 4 as next digit of the result. 
Result so far: 79801.654
If we take 2572 away from 3050, we end up with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Let's proceed to step 12:
643 can be fit into 4780 7 times, resulting in a remainder of 279.
Put 7 as the next digit of the answer. 
Result so far: 79801.6547
Subtract 4501 from 4780 to get 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 13:
643 can be fit into 2790 4 times, resulting in a remainder of 218.
Record the quotient 4 as the next digit in the result. 
Result so far: 79801.65474
Deduct 2572 from 2790 and we're left with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 14:
643 goes into 2180 3 times with a remainder of 251.
Write down 3 as next digit of the result. 
Result so far: 79801.654743
The remainder is 251 after subtracting 1929 from 2180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

On to step 15:
If we divide 2510 by 643, we get 3 and a remainder of 581.
The number 3 becomes the next digit in our result. 
Result so far: 79801.6547433
Subtracting 1929 from 2510 leaves us with 581.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5810, and continue the process.

Our division results in 79801.6547433 with a remaining 5.81e-06.