636998 ÷ 15 
Let's see how many times 15 fits into 636998.

On to step 1:
If we divide 6 by 15, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 15

On to step 2:
15 can be fit into 63 4 times, resulting in a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 60 from 63 leaves us with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 15

Step 3:
36 divided by 15 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtracting 30 from 36 leaves us with 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 15

Step 4:
When dividing 69 by 15, we get 4 with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 424.0
Deduct 60 from 69 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 15

On to step 5:
When dividing 99 by 15, we get 6 with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 4246.0
The remainder is 9 after subtracting 90 from 99.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 15

On to step 6:
The number 15 fits into 98 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 42466.0
The remainder is 8 after subtracting 90 from 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
80 divided by 15 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 42466.5
If we subtract 75 from 80, we 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.

Advancing to step 8:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 42466.53
If we take 45 away from 50, we end up 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.

Advancing to step 9:
If we divide 50 by 15, we get 3 and a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 42466.533
If we take 45 away from 50, we end up 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.

The quotient of the division is 42466.533, and the remainder is 0.0005.