631900 divided by 18 
Let's see how many times 18 fits into 631900.

Step 1:
18 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 18

Going ahead to step 2:
When dividing 63 by 18, we get 3 with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 54 from 63 leaves us with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 18

On to step 3:
18 goes into 91 5 times with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
The remainder is 1 after subtracting 90 from 91.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 18

On to step 4:
When dividing 19 by 18, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 351.0
Deduct 18 from 19 and we're left with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 18

Advancing to step 5:
10 divided by 18 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 3510.0
Subtracting 0 from 10 leaves us with 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 18

Going ahead to step 6:
18 can be fit into 100 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 35105.0
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
The number 18 fits into 100 5 times, leaving a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 35105.5
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
The number 18 fits into 100 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 35105.55
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 35105.55 with a remainder of 0.01.