We look at the division of 75138639 by 7 
Let's see how many times 7 fits into 75138639.

Let's proceed to step 1:
7 divided by 7 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 7 from 7 to get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 7

On to step 2:
5 divided by 7 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 7

Moving on to step 3:
If we divide 51 by 7, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
If we subtract 49 from 51, we get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 7

Advancing to step 4:
The number 7 fits into 23 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 1073.0
Subtract 21 from 23 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 7

Step 5:
7 can be fit into 28 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 10734.0
Deduct 28 from 28 and we're left with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 7

Moving on to step 6:
6 divided by 7 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 107340.0
Subtract 0 from 6 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 7

On to step 7:
63 divided by 7 is 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 1073409.0
Deduct 63 from 63 and we're left with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 7

Going ahead to step 8:
9 divided by 7 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 10734091.0
Deduct 7 from 9 and we're left 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.

Advancing to step 9:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 10734091.2
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.

Advancing to step 10:
7 goes into 60 8 times with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 10734091.28
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 11:
When dividing 40 by 7, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 10734091.285
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.

Step 12:
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: 10734091.2857
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.

Advancing to step 13:
When dividing 10 by 7, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 10734091.28571
The remainder is 3 after subtracting 7 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 14:
30 divided by 7 is 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 10734091.285714
Subtracting 28 from 30 leaves us 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.

Moving on to step 15:
When dividing 20 by 7, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 10734091.2857142
Subtracting 14 from 20 leaves us 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.

Let's proceed to step 16:
When dividing 60 by 7, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 10734091.28571428
Deduct 56 from 60 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.

Our division results in 10734091.28571428 with a remaining 4e-09.