83620750 ÷ 42 
The aim is to understand the frequency of 42 in 83620750.

On to step 1:
If we divide 8 by 42, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 42

Moving on to step 2:
If we divide 83 by 42, we get 1 and a remainder of 41.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 42 from 83 and we're left with 41.
Take the next digit (6) from the dividend and append it to 41, then repeat: 416 / 42

On to step 3:
42 can be fit into 416 9 times, resulting in a remainder of 38.
The next digit of our result is 9. 
Result so far: 19.0
If we take 378 away from 416, we end up with 38.
Fetch the next digit (2) from the dividend, attach it to 38 and continue: 382 / 42

Step 4:
42 goes into 382 9 times with a remainder of 4.
The next digit of our result is 9. 
Result so far: 199.0
Subtract 378 from 382 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 42

Advancing to step 5:
When dividing 40 by 42, we get 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 1990.0
If we take 0 away from 40, we end up with 40.
Take the next digit (7) from the dividend and append it to 40, then repeat: 407 / 42

Going ahead to step 6:
The number 42 fits into 407 9 times, leaving a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 19909.0
If we take 378 away from 407, we end up with 29.
Grab the next digit (5) from the dividend, add it to 29, then carry on: 295 / 42

On to step 7:
42 goes into 295 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 199097.0
The remainder is 1 after subtracting 294 from 295.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 42

Going ahead to step 8:
42 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 1990970.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
100 divided by 42 is 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 1990970.2
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 10:
42 goes into 160 3 times with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 1990970.23
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
42 goes into 340 8 times with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 1990970.238
If we subtract 336 from 340, 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 12:
When dividing 40 by 42, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 1990970.238
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 13:
42 goes into 400 9 times with a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 1990970.23809
Subtracting 378 from 400 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 14:
The number 42 fits into 220 5 times, leaving a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 1990970.238095
If we take 210 away from 220, we end up with 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 15:
When dividing 100 by 42, we get 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 1990970.2380952
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 16:
42 goes into 160 3 times with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 1990970.23809523
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Our division results in 1990970.23809523 with a remaining 3.4e-08.