45654790 divided by 42 
The aim is to understand the frequency of 42 in 45654790.

Step 1:
4 divided by 42 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 42

Moving on to step 2:
42 goes into 45 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 42 from 45 to get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 42

Let's proceed to step 3:
If we divide 36 by 42, we get 0 and a remainder of 36.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 36, we end up with 36.
Grab the next digit (5) from the dividend, add it to 36, then carry on: 365 / 42

Step 4:
When dividing 365 by 42, we get 8 with a remainder of 29.
Record the quotient 8 as the next digit in the result. 
Result so far: 108.0
Deduct 336 from 365 and we're left with 29.
Grab the next digit (4) from the dividend, add it to 29, then carry on: 294 / 42

Step 5:
42 goes into 294 7 times with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 1087.0
If we subtract 294 from 294, we get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 42

Going ahead to step 6:
When dividing 7 by 42, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 10870.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 42

On to step 7:
42 can be fit into 79 1 times, resulting in a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 108701.0
If we take 42 away from 79, we end up with 37.
Grab the next digit (0) from the dividend, add it to 37, then carry on: 370 / 42

Advancing to step 8:
The number 42 fits into 370 8 times, leaving a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 1087018.0
If we take 336 away from 370, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 9:
340 divided by 42 is 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 1087018.8
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.

Advancing to step 10:
40 divided by 42 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 1087018.8
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.

Moving on to step 11:
400 divided by 42 is 9 with a remainder of 22.
Record the quotient 9 as the next digit in the result. 
Result so far: 1087018.809
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.

Let's proceed to step 12:
When dividing 220 by 42, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 1087018.8095
Deduct 210 from 220 and we're left 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.

Step 13:
The number 42 fits into 100 2 times, leaving a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 1087018.80952
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
42 can be fit into 160 3 times, resulting in a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 1087018.809523
Subtracting 126 from 160 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 15:
340 divided by 42 is 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 1087018.8095238
Deduct 336 from 340 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 16:
42 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 1087018.8095238
Subtract 0 from 40 to 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.

Our division results in 1087018.8095238 with a remaining 4e-08.