4213215 divided by 420 
Let's see how many times 420 fits into 4213215.

Let's proceed to step 1:
The number 420 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 420

Advancing to step 2:
The number 420 fits into 42 0 times, leaving a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 420

Moving on to step 3:
The number 420 fits into 421 1 times, leaving a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 420 away from 421, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 420

Advancing to step 4:
13 divided by 420 is 0 with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 13 to get 13.
Bring next digit (2) of the dividend behind the 13 and repeat the process: 132 / 420

Going ahead to step 5:
420 goes into 132 0 times with a remainder of 132.
Use 0 as the next digit of our solution. 
Result so far: 100.0
Deduct 0 from 132 and we're left with 132.
Include the next digit (1) from the dividend after 132, then repeat: 1321 / 420

Let's proceed to step 6:
The number 420 fits into 1321 3 times, leaving a remainder of 61.
Put 3 as the next digit of the answer. 
Result so far: 1003.0
Subtracting 1260 from 1321 leaves us with 61.
Include the next digit (5) from the dividend after 61, then repeat: 615 / 420

Going ahead to step 7:
420 goes into 615 1 times with a remainder of 195.
The next digit of our result is 1. 
Result so far: 10031.0
If we subtract 420 from 615, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Let's proceed to step 8:
The number 420 fits into 1950 4 times, leaving a remainder of 270.
The number 4 becomes the next digit in our result. 
Result so far: 10031.4
Subtract 1680 from 1950 to get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

On to step 9:
If we divide 2700 by 420, we get 6 and a remainder of 180.
The next digit of our result is 6. 
Result so far: 10031.46
If we take 2520 away from 2700, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 10:
The number 420 fits into 1800 4 times, leaving a remainder of 120.
Write down 4 as next digit of the result. 
Result so far: 10031.464
Subtract 1680 from 1800 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 11:
1200 divided by 420 is 2 with a remainder of 360.
Use 2 as the next digit of our solution. 
Result so far: 10031.4642
Deduct 840 from 1200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 12:
420 goes into 3600 8 times with a remainder of 240.
Write down 8 as next digit of the result. 
Result so far: 10031.46428
Subtracting 3360 from 3600 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 13:
420 can be fit into 2400 5 times, resulting in a remainder of 300.
Use 5 as the next digit of our solution. 
Result so far: 10031.464285
Subtract 2100 from 2400 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Going ahead to step 14:
The number 420 fits into 3000 7 times, leaving a remainder of 60.
Record the quotient 7 as the next digit in the result. 
Result so far: 10031.4642857
Subtract 2940 from 3000 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 15:
600 divided by 420 is 1 with a remainder of 180.
The next digit of our result is 1. 
Result so far: 10031.46428571
If we take 420 away from 600, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final result is 10031.46428571 with a remainder of 1.8e-07.