We look at the division of 40439389 by 872 
We want to divide 40439389 by 872.

Let's proceed to step 1:
4 divided by 872 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 872

Going ahead to step 2:
If we divide 40 by 872, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Take the next digit (4) from the dividend and append it to 40, then repeat: 404 / 872

Going ahead to step 3:
When dividing 404 by 872, we get 0 with a remainder of 404.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 404 leaves us with 404.
Fetch the next digit (3) from the dividend, attach it to 404 and continue: 4043 / 872

Going ahead to step 4:
If we divide 4043 by 872, we get 4 and a remainder of 555.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 3488 from 4043 and we're left with 555.
Bring next digit (9) of the dividend behind the 555 and repeat the process: 5559 / 872

On to step 5:
The number 872 fits into 5559 6 times, leaving a remainder of 327.
Write down 6 as next digit of the result. 
Result so far: 46.0
Subtracting 5232 from 5559 leaves us with 327.
Fetch the next digit (3) from the dividend, attach it to 327 and continue: 3273 / 872

Moving on to step 6:
3273 divided by 872 is 3 with a remainder of 657.
The number 3 becomes the next digit in our result. 
Result so far: 463.0
The remainder is 657 after subtracting 2616 from 3273.
Bring next digit (8) of the dividend behind the 657 and repeat the process: 6578 / 872

Let's proceed to step 7:
872 can be fit into 6578 7 times, resulting in a remainder of 474.
Put 7 as the next digit of the answer. 
Result so far: 4637.0
Subtract 6104 from 6578 to get 474.
Bring next digit (9) of the dividend behind the 474 and repeat the process: 4749 / 872

Going ahead to step 8:
872 can be fit into 4749 5 times, resulting in a remainder of 389.
Write down 5 as next digit of the result. 
Result so far: 46375.0
Deduct 4360 from 4749 and we're left with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Advancing to step 9:
872 goes into 3890 4 times with a remainder of 402.
Write down 4 as next digit of the result. 
Result so far: 46375.4
Subtracting 3488 from 3890 leaves us with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Advancing to step 10:
The number 872 fits into 4020 4 times, leaving a remainder of 532.
The number 4 becomes the next digit in our result. 
Result so far: 46375.44
Deduct 3488 from 4020 and we're left with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

The quotient of the division is 46375.44, and the remainder is 0.532.