We divide 638925 by 40
Our goal is to divide 638925 by 40.

Step 1:
If we divide 6 by 40, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 40

Let's proceed to step 2:
63 divided by 40 is 1 with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 40 from 63 to get 23.
Take the next digit (8) from the dividend and append it to 23, then repeat: 238 / 40

Going ahead to step 3:
238 divided by 40 is 5 with a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Deduct 200 from 238 and we're left with 38.
Fetch the next digit (9) from the dividend, attach it to 38 and continue: 389 / 40

Moving on to step 4:
When dividing 389 by 40, we get 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 159.0
If we take 360 away from 389, we end up with 29.
Grab the next digit (2) from the dividend, add it to 29, then carry on: 292 / 40

Let's proceed to step 5:
When dividing 292 by 40, we get 7 with a remainder of 12.
The next digit of our result is 7. 
Result so far: 1597.0
The remainder is 12 after subtracting 280 from 292.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 40

Advancing to step 6:
40 can be fit into 125 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 15973.0
If we take 120 away from 125, 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.

Moving on to step 7:
40 goes into 50 1 times with a remainder of 10.
The next digit of our result is 1. 
Result so far: 15973.1
Deduct 40 from 50 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.

On to step 8:
40 goes into 100 2 times with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 15973.12
The remainder is 20 after subtracting 80 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
The number 40 fits into 200 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 15973.125
Deduct 200 from 200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
When dividing 0 by 40, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 15973.125
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
When dividing 0 by 40, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15973.125
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 15973.125, and the remainder is 0.0.