Let's divide 521687 by 7
We want to divide 521687 by 7.

Moving on to step 1:
The number 7 fits into 5 0 times, leaving 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 (2) of the dividend behind the 5 and repeat the process: 52 / 7

On to step 2:
7 can be fit into 52 7 times, resulting in a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 49 from 52 to get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 7

Moving on to step 3:
7 goes into 31 4 times with a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 74.0
Subtracting 28 from 31 leaves us with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 7

Let's proceed to step 4:
36 divided by 7 is 5 with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 745.0
Subtracting 35 from 36 leaves us with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 7

Moving on to step 5:
7 goes into 18 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 7452.0
If we subtract 14 from 18, we get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 7

Step 6:
The number 7 fits into 47 6 times, leaving a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 74526.0
Deduct 42 from 47 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
If we divide 50 by 7, we get 7 and a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 74526.7
If we take 49 away from 50, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 8:
10 divided by 7 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 74526.71
Subtract 7 from 10 to 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.

On to step 9:
When dividing 30 by 7, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 74526.714
Subtract 28 from 30 to 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.

Advancing to step 10:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 74526.7142
Deduct 14 from 20 and we're left 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.

Moving on to step 11:
7 can be fit into 60 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 74526.71428
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.

Let's proceed to step 12:
7 goes into 40 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 74526.714285
The remainder is 5 after subtracting 35 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 13:
The number 7 fits into 50 7 times, leaving a remainder of 1.
The next digit of our result is 7. 
Result so far: 74526.7142857
If we take 49 away from 50, we end up with 1.
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 14:
7 can be fit into 10 1 times, resulting in a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 74526.71428571
Subtracting 7 from 10 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The quotient of the division is 74526.71428571, and the remainder is 3e-09.