89045913 divided by 7 
The aim is to understand the frequency of 7 in 89045913.

On to step 1:
7 can be fit into 8 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 7 from 8 to get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 7

Let's proceed to step 2:
The number 7 fits into 19 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 14 from 19 leaves us with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 7

Let's proceed to step 3:
When dividing 50 by 7, we get 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 127.0
Subtracting 49 from 50 leaves us with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 7

Moving on to step 4:
When dividing 14 by 7, we get 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 1272.0
If we take 14 away from 14, we end up with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 7

Let's proceed to step 5:
When dividing 5 by 7, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 12720.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 7

Let's proceed to step 6:
When dividing 59 by 7, we get 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 127208.0
If we subtract 56 from 59, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 7

Moving on to step 7:
If we divide 31 by 7, we get 4 and a remainder of 3.
The next digit of our result is 4. 
Result so far: 1272084.0
If we take 28 away from 31, we end up with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 7

On to step 8:
7 goes into 33 4 times with a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 12720844.0
If we take 28 away from 33, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
The number 7 fits into 50 7 times, leaving a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 12720844.7
If we subtract 49 from 50, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 10:
When dividing 10 by 7, we get 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 12720844.71
Subtract 7 from 10 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 11:
When dividing 30 by 7, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 12720844.714
The remainder is 2 after subtracting 28 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
When dividing 20 by 7, we get 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 12720844.7142
Deduct 14 from 20 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
60 divided by 7 is 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 12720844.71428
Subtract 56 from 60 to 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.

Going ahead to step 14:
7 can be fit into 40 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 12720844.714285
Deduct 35 from 40 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 15:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 12720844.7142857
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 16:
7 goes into 10 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 12720844.71428571
Subtract 7 from 10 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Our division results in 12720844.71428571 with a remaining 3e-09.