12299085 divided by 420 
We want to divide 12299085 by 420.

On to step 1:
The number 420 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 420

Let's proceed to step 2:
420 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 420

Step 3:
When dividing 122 by 420, we get 0 with a remainder of 122.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 122 and we're left with 122.
Include the next digit (9) from the dividend after 122, then repeat: 1229 / 420

Going ahead to step 4:
The number 420 fits into 1229 2 times, leaving a remainder of 389.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 840 from 1229, we get 389.
Grab the next digit (9) from the dividend, add it to 389, then carry on: 3899 / 420

On to step 5:
The number 420 fits into 3899 9 times, leaving a remainder of 119.
Use 9 as the next digit of our solution. 
Result so far: 29.0
If we subtract 3780 from 3899, we get 119.
Take the next digit (0) from the dividend and append it to 119, then repeat: 1190 / 420

On to step 6:
420 can be fit into 1190 2 times, resulting in a remainder of 350.
The number 2 becomes the next digit in our result. 
Result so far: 292.0
Deduct 840 from 1190 and we're left with 350.
Include the next digit (8) from the dividend after 350, then repeat: 3508 / 420

Going ahead to step 7:
3508 divided by 420 is 8 with a remainder of 148.
Write down 8 as next digit of the result. 
Result so far: 2928.0
If we take 3360 away from 3508, we end up with 148.
Bring next digit (5) of the dividend behind the 148 and repeat the process: 1485 / 420

Going ahead to step 8:
When dividing 1485 by 420, we get 3 with a remainder of 225.
The number 3 becomes the next digit in our result. 
Result so far: 29283.0
Subtracting 1260 from 1485 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Going ahead to step 9:
When dividing 2250 by 420, we get 5 with a remainder of 150.
Use 5 as the next digit of our solution. 
Result so far: 29283.5
Subtract 2100 from 2250 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 10:
420 goes into 1500 3 times with a remainder of 240.
Put 3 as the next digit of the answer. 
Result so far: 29283.53
If we subtract 1260 from 1500, 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.

Step 11:
420 can be fit into 2400 5 times, resulting in a remainder of 300.
Record the quotient 5 as the next digit in the result. 
Result so far: 29283.535
Deduct 2100 from 2400 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 12:
3000 divided by 420 is 7 with a remainder of 60.
Write down 7 as next digit of the result. 
Result so far: 29283.5357
Deduct 2940 from 3000 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 13:
420 goes into 600 1 times with a remainder of 180.
Record the quotient 1 as the next digit in the result. 
Result so far: 29283.53571
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.

On to step 14:
When dividing 1800 by 420, we get 4 with a remainder of 120.
The number 4 becomes the next digit in our result. 
Result so far: 29283.535714
The remainder is 120 after subtracting 1680 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 15:
420 can be fit into 1200 2 times, resulting in a remainder of 360.
The number 2 becomes the next digit in our result. 
Result so far: 29283.5357142
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.

Advancing to step 16:
When dividing 3600 by 420, we get 8 with a remainder of 240.
The number 8 becomes the next digit in our result. 
Result so far: 29283.53571428
The remainder is 240 after subtracting 3360 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Our division results in 29283.53571428 with a remaining 2.4e-07.