56487521 divided by 42 
The aim is to understand the frequency of 42 in 56487521.

On to step 1:
5 divided by 42 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 42

Moving on to step 2:
The number 42 fits into 56 1 times, leaving a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 42 from 56 and we're left with 14.
Append the next digit (4) from the dividend to 14 and continue with: 144 / 42

On to step 3:
When dividing 144 by 42, we get 3 with a remainder of 18.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 126 from 144 to get 18.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 42

On to step 4:
188 divided by 42 is 4 with a remainder of 20.
The next digit of our result is 4. 
Result so far: 134.0
Subtracting 168 from 188 leaves us with 20.
Include the next digit (7) from the dividend after 20, then repeat: 207 / 42

Moving on to step 5:
42 can be fit into 207 4 times, resulting in a remainder of 39.
Use 4 as the next digit of our solution. 
Result so far: 1344.0
The remainder is 39 after subtracting 168 from 207.
Include the next digit (5) from the dividend after 39, then repeat: 395 / 42

Let's proceed to step 6:
395 divided by 42 is 9 with a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 13449.0
Deduct 378 from 395 and we're left with 17.
Fetch the next digit (2) from the dividend, attach it to 17 and continue: 172 / 42

Step 7:
If we divide 172 by 42, we get 4 and a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 134494.0
Subtract 168 from 172 to get 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 42

Going ahead to step 8:
42 goes into 41 0 times with a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 1344940.0
Subtract 0 from 41 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 9:
When dividing 410 by 42, we get 9 with a remainder of 32.
The next digit of our result is 9. 
Result so far: 1344940.9
If we take 378 away from 410, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 10:
When dividing 320 by 42, we get 7 with a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 1344940.97
Subtracting 294 from 320 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 11:
42 goes into 260 6 times with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 1344940.976
If we subtract 252 from 260, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
42 goes into 80 1 times with a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 1344940.9761
If we subtract 42 from 80, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 13:
If we divide 380 by 42, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 1344940.97619
If we take 378 away from 380, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
When dividing 20 by 42, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 1344940.97619
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 15:
If we divide 200 by 42, we get 4 and a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 1344940.9761904
The remainder is 32 after subtracting 168 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 16:
The number 42 fits into 320 7 times, leaving a remainder of 26.
The next digit of our result is 7. 
Result so far: 1344940.97619047
Deduct 294 from 320 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Our division results in 1344940.97619047 with a remaining 2.6e-08.