91387125 ÷ 6 
We want to divide 91387125 by 6.

Step 1:
The number 6 fits into 9 1 times, leaving a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 3 after subtracting 6 from 9.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 6

On to step 2:
6 goes into 31 5 times with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 30 from 31 leaves us with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 6

Step 3:
6 goes into 13 2 times with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 152.0
Subtracting 12 from 13 leaves us with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 6

Advancing to step 4:
When dividing 18 by 6, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 1523.0
If we subtract 18 from 18, we get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 6

On to step 5:
7 divided by 6 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 15231.0
Subtracting 6 from 7 leaves us with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 6

Let's proceed to step 6:
If we divide 11 by 6, we get 1 and a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 152311.0
Subtracting 6 from 11 leaves us with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 6

Advancing to step 7:
6 can be fit into 52 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 1523118.0
If we subtract 48 from 52, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 6

Advancing to step 8:
6 can be fit into 45 7 times, resulting in a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 15231187.0
If we take 42 away from 45, 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.

Moving on to step 9:
When dividing 30 by 6, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 15231187.5
The remainder is 0 after subtracting 30 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
6 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15231187.5
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
If we divide 0 by 6, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15231187.5
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 15231187.5 with a remainder of 0.0.