We're dividing 8433389 by 420 
We want to divide 8433389 by 420.

On to step 1:
If we divide 8 by 420, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 420

Let's proceed to step 2:
The number 420 fits into 84 0 times, leaving a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 84 and we're left with 84.
Grab the next digit (3) from the dividend, add it to 84, then carry on: 843 / 420

Step 3:
420 can be fit into 843 2 times, resulting in a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 840 from 843 and we're left with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 420

Let's proceed to step 4:
420 can be fit into 33 0 times, resulting in a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
If we subtract 0 from 33, we get 33.
Append the next digit (3) from the dividend to 33 and continue with: 333 / 420

Moving on to step 5:
420 goes into 333 0 times with a remainder of 333.
Write down 0 as next digit of the result. 
Result so far: 200.0
Subtracting 0 from 333 leaves us with 333.
Grab the next digit (8) from the dividend, add it to 333, then carry on: 3338 / 420

Moving on to step 6:
3338 divided by 420 is 7 with a remainder of 398.
Use 7 as the next digit of our solution. 
Result so far: 2007.0
Subtracting 2940 from 3338 leaves us with 398.
Include the next digit (9) from the dividend after 398, then repeat: 3989 / 420

Step 7:
If we divide 3989 by 420, we get 9 and a remainder of 209.
The next digit of our result is 9. 
Result so far: 20079.0
Subtracting 3780 from 3989 leaves us with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 8:
420 can be fit into 2090 4 times, resulting in a remainder of 410.
The next digit of our result is 4. 
Result so far: 20079.4
Subtract 1680 from 2090 to get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Advancing to step 9:
4100 divided by 420 is 9 with a remainder of 320.
Write down 9 as next digit of the result. 
Result so far: 20079.49
Deduct 3780 from 4100 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 10:
420 can be fit into 3200 7 times, resulting in a remainder of 260.
The next digit of our result is 7. 
Result so far: 20079.497
The remainder is 260 after subtracting 2940 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 11:
The number 420 fits into 2600 6 times, leaving a remainder of 80.
The next digit of our result is 6. 
Result so far: 20079.4976
Deduct 2520 from 2600 and we're left 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.

On to step 12:
420 goes into 800 1 times with a remainder of 380.
Use 1 as the next digit of our solution. 
Result so far: 20079.49761
Deduct 420 from 800 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Moving on to step 13:
420 can be fit into 3800 9 times, resulting in a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 20079.497619
The remainder is 20 after subtracting 3780 from 3800.
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 14:
200 divided by 420 is 0 with a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 20079.497619
Deduct 0 from 200 and we're left 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.

Step 15:
If we divide 2000 by 420, we get 4 and a remainder of 320.
Put 4 as the next digit of the answer. 
Result so far: 20079.49761904
If we subtract 1680 from 2000, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The quotient of the division is 20079.49761904, and the remainder is 3.2e-07.