We're dividing 29912181 by 420 
We want to figure out the number of times 29912181 can be divided by 420.

Let's proceed to step 1:
2 divided by 420 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 420

On to step 2:
The number 420 fits into 29 0 times, leaving a remainder of 29.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 29 and we're left with 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 420

Going ahead to step 3:
When dividing 299 by 420, we get 0 with a remainder of 299.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 299, we end up with 299.
Append the next digit (1) from the dividend to 299 and continue with: 2991 / 420

Advancing to step 4:
When dividing 2991 by 420, we get 7 with a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 2940 from 2991 and we're left with 51.
Bring next digit (2) of the dividend behind the 51 and repeat the process: 512 / 420

Advancing to step 5:
420 can be fit into 512 1 times, resulting in a remainder of 92.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
If we take 420 away from 512, we end up with 92.
Grab the next digit (1) from the dividend, add it to 92, then carry on: 921 / 420

Moving on to step 6:
420 can be fit into 921 2 times, resulting in a remainder of 81.
Write down 2 as next digit of the result. 
Result so far: 712.0
If we subtract 840 from 921, we get 81.
Bring next digit (8) of the dividend behind the 81 and repeat the process: 818 / 420

Going ahead to step 7:
420 can be fit into 818 1 times, resulting in a remainder of 398.
Put 1 as the next digit of the answer. 
Result so far: 7121.0
If we take 420 away from 818, we end up with 398.
Grab the next digit (1) from the dividend, add it to 398, then carry on: 3981 / 420

Let's proceed to step 8:
420 goes into 3981 9 times with a remainder of 201.
The next digit of our result is 9. 
Result so far: 71219.0
Subtracting 3780 from 3981 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Moving on to step 9:
2010 divided by 420 is 4 with a remainder of 330.
Put 4 as the next digit of the answer. 
Result so far: 71219.4
If we subtract 1680 from 2010, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Moving on to step 10:
The number 420 fits into 3300 7 times, leaving a remainder of 360.
The next digit of our result is 7. 
Result so far: 71219.47
If we subtract 2940 from 3300, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 11:
420 goes into 3600 8 times with a remainder of 240.
Put 8 as the next digit of the answer. 
Result so far: 71219.478
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.

Let's proceed to step 12:
420 can be fit into 2400 5 times, resulting in a remainder of 300.
The number 5 becomes the next digit in our result. 
Result so far: 71219.4785
Subtracting 2100 from 2400 leaves us 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.

Moving on to step 13:
When dividing 3000 by 420, we get 7 with a remainder of 60.
The number 7 becomes the next digit in our result. 
Result so far: 71219.47857
If we subtract 2940 from 3000, we 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.

Let's proceed to step 14:
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: 71219.478571
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.

Moving on to step 15:
If we divide 1800 by 420, we get 4 and a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 71219.4785714
If we subtract 1680 from 1800, we 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.

Advancing to step 16:
1200 divided by 420 is 2 with a remainder of 360.
Write down 2 as next digit of the result. 
Result so far: 71219.47857142
Subtract 840 from 1200 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

The final outcome is 71219.47857142, with a leftover of 3.6e-07.