We look at the division of 42432374 by 803 
Let's see how many times 803 fits into 42432374.

Let's proceed to step 1:
If we divide 4 by 803, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 803

Step 2:
42 divided by 803 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Append the next digit (4) from the dividend to 42 and continue with: 424 / 803

Advancing to step 3:
If we divide 424 by 803, we get 0 and a remainder of 424.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 424 to get 424.
Bring next digit (3) of the dividend behind the 424 and repeat the process: 4243 / 803

Advancing to step 4:
803 goes into 4243 5 times with a remainder of 228.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 4015 from 4243 to get 228.
Include the next digit (2) from the dividend after 228, then repeat: 2282 / 803

Let's proceed to step 5:
2282 divided by 803 is 2 with a remainder of 676.
The next digit of our result is 2. 
Result so far: 52.0
Subtracting 1606 from 2282 leaves us with 676.
Take the next digit (3) from the dividend and append it to 676, then repeat: 6763 / 803

Let's proceed to step 6:
803 can be fit into 6763 8 times, resulting in a remainder of 339.
Use 8 as the next digit of our solution. 
Result so far: 528.0
If we take 6424 away from 6763, we end up with 339.
Take the next digit (7) from the dividend and append it to 339, then repeat: 3397 / 803

Going ahead to step 7:
803 can be fit into 3397 4 times, resulting in a remainder of 185.
The next digit of our result is 4. 
Result so far: 5284.0
Deduct 3212 from 3397 and we're left with 185.
Fetch the next digit (4) from the dividend, attach it to 185 and continue: 1854 / 803

On to step 8:
803 can be fit into 1854 2 times, resulting in a remainder of 248.
Write down 2 as next digit of the result. 
Result so far: 52842.0
If we subtract 1606 from 1854, we get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Step 9:
The number 803 fits into 2480 3 times, leaving a remainder of 71.
Use 3 as the next digit of our solution. 
Result so far: 52842.3
If we take 2409 away from 2480, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 10:
803 can be fit into 710 0 times, resulting in a remainder of 710.
Put 0 as the next digit of the answer. 
Result so far: 52842.3
Subtracting 0 from 710 leaves us with 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

Step 11:
When dividing 7100 by 803, we get 8 with a remainder of 676.
The next digit of our result is 8. 
Result so far: 52842.308
Deduct 6424 from 7100 and we're left with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Advancing to step 12:
If we divide 6760 by 803, we get 8 and a remainder of 336.
The next digit of our result is 8. 
Result so far: 52842.3088
If we take 6424 away from 6760, we end up with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Our division results in 52842.3088 with a remaining 0.00336.