We divide 642420 by 7
We're looking to find how many times 7 goes into 642420.

Moving on to step 1:
If we divide 6 by 7, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 7

Going ahead to step 2:
7 goes into 64 9 times with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 1 after subtracting 63 from 64.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 7

Advancing to step 3:
When dividing 12 by 7, we get 1 with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 91.0
Deduct 7 from 12 and we're left with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 7

Moving on to step 4:
7 goes into 54 7 times with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 917.0
The remainder is 5 after subtracting 49 from 54.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 7

Moving on to step 5:
7 goes into 52 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 9177.0
Subtracting 49 from 52 leaves us with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 7

Moving on to step 6:
The number 7 fits into 30 4 times, leaving a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 91774.0
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.

On to step 7:
20 divided by 7 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 91774.2
If we take 14 away from 20, we end up 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.

Going ahead to step 8:
7 goes into 60 8 times with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 91774.28
If we take 56 away from 60, we end up 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.

Step 9:
When dividing 40 by 7, we get 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 91774.285
Subtracting 35 from 40 leaves us 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.

On to step 10:
When dividing 50 by 7, we get 7 with a remainder of 1.
The next digit of our result is 7. 
Result so far: 91774.2857
Subtract 49 from 50 to 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.

Advancing to step 11:
10 divided by 7 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 91774.28571
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.

Let's proceed to step 12:
7 goes into 30 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 91774.285714
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.

Going ahead to step 13:
7 goes into 20 2 times with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 91774.2857142
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.

On to step 14:
If we divide 60 by 7, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 91774.28571428
If we take 56 away from 60, we end up 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.

After the division, we end up with 91774.28571428 and a remainder of 4e-09.