420898 divided by 12 
Let's see how many times 12 fits into 420898.

Going ahead to step 1:
12 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 12

Let's proceed to step 2:
12 can be fit into 42 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 36 from 42 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 12

On to step 3:
If we divide 60 by 12, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Deduct 60 from 60 and we're left with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 12

Moving on to step 4:
8 divided by 12 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 350.0
Subtract 0 from 8 to get 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 12

Let's proceed to step 5:
If we divide 89 by 12, we get 7 and a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 3507.0
Subtract 84 from 89 to get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 12

Going ahead to step 6:
When dividing 58 by 12, we get 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 35074.0
If we subtract 48 from 58, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
12 can be fit into 100 8 times, resulting in a remainder of 4.
The next digit of our result is 8. 
Result so far: 35074.8
If we subtract 96 from 100, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 35074.83
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 35074.833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 35074.833, and the remainder is 0.0004.