We look at the division of 42403004 by 520 
We want to divide 42403004 by 520.

Moving on to step 1:
4 divided by 520 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 520

On to step 2:
When dividing 42 by 520, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 520

Going ahead to step 3:
The number 520 fits into 424 0 times, leaving a remainder of 424.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 424 leaves us with 424.
Fetch the next digit (0) from the dividend, attach it to 424 and continue: 4240 / 520

Advancing to step 4:
The number 520 fits into 4240 8 times, leaving a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 4160 from 4240 and we're left with 80.
Append the next digit (3) from the dividend to 80 and continue with: 803 / 520

Step 5:
520 can be fit into 803 1 times, resulting in a remainder of 283.
Write down 1 as next digit of the result. 
Result so far: 81.0
Deduct 520 from 803 and we're left with 283.
Bring next digit (0) of the dividend behind the 283 and repeat the process: 2830 / 520

Going ahead to step 6:
If we divide 2830 by 520, we get 5 and a remainder of 230.
Use 5 as the next digit of our solution. 
Result so far: 815.0
Subtracting 2600 from 2830 leaves us with 230.
Bring next digit (0) of the dividend behind the 230 and repeat the process: 2300 / 520

Let's proceed to step 7:
When dividing 2300 by 520, we get 4 with a remainder of 220.
The number 4 becomes the next digit in our result. 
Result so far: 8154.0
If we subtract 2080 from 2300, we get 220.
Include the next digit (4) from the dividend after 220, then repeat: 2204 / 520

Going ahead to step 8:
520 goes into 2204 4 times with a remainder of 124.
Use 4 as the next digit of our solution. 
Result so far: 81544.0
If we subtract 2080 from 2204, we get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Going ahead to step 9:
1240 divided by 520 is 2 with a remainder of 200.
Use 2 as the next digit of our solution. 
Result so far: 81544.2
Subtracting 1040 from 1240 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
When dividing 2000 by 520, we get 3 with a remainder of 440.
Write down 3 as next digit of the result. 
Result so far: 81544.23
The remainder is 440 after subtracting 1560 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

On to step 11:
520 can be fit into 4400 8 times, resulting in a remainder of 240.
The next digit of our result is 8. 
Result so far: 81544.238
If we subtract 4160 from 4400, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 12:
When dividing 2400 by 520, we get 4 with a remainder of 320.
Write down 4 as next digit of the result. 
Result so far: 81544.2384
The remainder is 320 after subtracting 2080 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 13:
The number 520 fits into 3200 6 times, leaving a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 81544.23846
Subtracting 3120 from 3200 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 14:
If we divide 800 by 520, we get 1 and a remainder of 280.
Use 1 as the next digit of our solution. 
Result so far: 81544.238461
Deduct 520 from 800 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 15:
520 can be fit into 2800 5 times, resulting in a remainder of 200.
The number 5 becomes the next digit in our result. 
Result so far: 81544.2384615
If we take 2600 away from 2800, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 16:
520 goes into 2000 3 times with a remainder of 440.
Use 3 as the next digit of our solution. 
Result so far: 81544.23846153
Deduct 1560 from 2000 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

The quotient of the division is 81544.23846153, and the remainder is 4.4e-07.