We're dividing 76012638 by 420 
The aim is to understand the frequency of 420 in 76012638.

On to step 1:
420 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 420

On to step 2:
420 can be fit into 76 0 times, resulting in a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Take the next digit (0) from the dividend and append it to 76, then repeat: 760 / 420

Advancing to step 3:
When dividing 760 by 420, we get 1 with a remainder of 340.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 420 away from 760, we end up with 340.
Include the next digit (1) from the dividend after 340, then repeat: 3401 / 420

Going ahead to step 4:
420 goes into 3401 8 times with a remainder of 41.
Put 8 as the next digit of the answer. 
Result so far: 18.0
The remainder is 41 after subtracting 3360 from 3401.
Append the next digit (2) from the dividend to 41 and continue with: 412 / 420

Going ahead to step 5:
If we divide 412 by 420, we get 0 and a remainder of 412.
Put 0 as the next digit of the answer. 
Result so far: 180.0
Deduct 0 from 412 and we're left with 412.
Include the next digit (6) from the dividend after 412, then repeat: 4126 / 420

Let's proceed to step 6:
The number 420 fits into 4126 9 times, leaving a remainder of 346.
Use 9 as the next digit of our solution. 
Result so far: 1809.0
If we subtract 3780 from 4126, we get 346.
Grab the next digit (3) from the dividend, add it to 346, then carry on: 3463 / 420

Step 7:
When dividing 3463 by 420, we get 8 with a remainder of 103.
The number 8 becomes the next digit in our result. 
Result so far: 18098.0
The remainder is 103 after subtracting 3360 from 3463.
Bring next digit (8) of the dividend behind the 103 and repeat the process: 1038 / 420

Step 8:
1038 divided by 420 is 2 with a remainder of 198.
Use 2 as the next digit of our solution. 
Result so far: 180982.0
The remainder is 198 after subtracting 840 from 1038.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Going ahead to step 9:
1980 divided by 420 is 4 with a remainder of 300.
Record the quotient 4 as the next digit in the result. 
Result so far: 180982.4
Subtract 1680 from 1980 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.

Let's proceed to step 10:
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: 180982.47
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.

Going ahead to step 11:
600 divided by 420 is 1 with a remainder of 180.
Write down 1 as next digit of the result. 
Result so far: 180982.471
Subtracting 420 from 600 leaves us 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.

Let's proceed to step 12:
The number 420 fits into 1800 4 times, leaving a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 180982.4714
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.

On to step 13:
If we divide 1200 by 420, we get 2 and a remainder of 360.
The next digit of our result is 2. 
Result so far: 180982.47142
If we take 840 away from 1200, we end up 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.

Let's proceed to step 14:
3600 divided by 420 is 8 with a remainder of 240.
The next digit of our result is 8. 
Result so far: 180982.471428
Subtract 3360 from 3600 to 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.

Going ahead to step 15:
When dividing 2400 by 420, we get 5 with a remainder of 300.
The next digit of our result is 5. 
Result so far: 180982.4714285
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.

Advancing to step 16:
3000 divided by 420 is 7 with a remainder of 60.
Put 7 as the next digit of the answer. 
Result so far: 180982.47142857
Subtracting 2940 from 3000 leaves us 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.

The final outcome is 180982.47142857, with a leftover of 6e-08.