Let's divide 51207 by 7
We want to figure out the number of times 51207 can be divided by 7.

Going ahead to step 1:
7 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 7

Going ahead to step 2:
51 divided by 7 is 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 49 from 51 leaves us with 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 7

On to step 3:
22 divided by 7 is 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 73.0
Subtracting 21 from 22 leaves us with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 7

Moving on to step 4:
The number 7 fits into 10 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 731.0
If we subtract 7 from 10, we get 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 7

On to step 5:
37 divided by 7 is 5 with a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 7315.0
If we subtract 35 from 37, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 6:
If we divide 20 by 7, we get 2 and a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 7315.2
If we subtract 14 from 20, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
The number 7 fits into 60 8 times, leaving a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 7315.28
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
7 can be fit into 40 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 7315.285
Subtract 35 from 40 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 9:
7 goes into 50 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 7315.2857
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 10:
7 goes into 10 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 7315.28571
If we subtract 7 from 10, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 11:
7 can be fit into 30 4 times, resulting in a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 7315.285714
Deduct 28 from 30 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 12:
20 divided by 7 is 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 7315.2857142
Subtracting 14 from 20 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
The number 7 fits into 60 8 times, leaving a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 7315.28571428
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 7315.28571428 and a remainder of 4e-09.