641420 divided by 7 
The aim is to understand the frequency of 7 in 641420.

Let's proceed to step 1:
The number 7 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 7

Let's proceed to step 2:
When dividing 64 by 7, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 63 from 64, we get 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 7

Advancing to step 3:
The number 7 fits into 11 1 times, leaving a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
If we subtract 7 from 11, we get 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 7

Going ahead to step 4:
If we divide 44 by 7, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 916.0
The remainder is 2 after subtracting 42 from 44.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 7

On to step 5:
22 divided by 7 is 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 9163.0
Subtract 21 from 22 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 7

Moving on to step 6:
10 divided by 7 is 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 91631.0
If we take 7 away from 10, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
If we divide 30 by 7, we get 4 and a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 91631.4
Subtract 28 from 30 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
7 can be fit into 20 2 times, resulting in a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 91631.42
If we subtract 14 from 20, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
The number 7 fits into 60 8 times, leaving a remainder of 4.
The next digit of our result is 8. 
Result so far: 91631.428
Subtracting 56 from 60 leaves us 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.

Going ahead to step 10:
When dividing 40 by 7, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 91631.4285
Subtract 35 from 40 to get 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 11:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 91631.42857
If we take 49 away from 50, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 12:
If we divide 10 by 7, we get 1 and a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 91631.428571
Deduct 7 from 10 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 13:
When dividing 30 by 7, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 91631.4285714
If we subtract 28 from 30, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
If we divide 20 by 7, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 91631.42857142
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.

The quotient of the division is 91631.42857142, and the remainder is 6e-09.