12546173 divided by 665 
We want to figure out the number of times 12546173 can be divided by 665.

Advancing to step 1:
665 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 665

Advancing to step 2:
665 goes into 12 0 times with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 665

Step 3:
If we divide 125 by 665, we get 0 and a remainder of 125.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 125 leaves us with 125.
Grab the next digit (4) from the dividend, add it to 125, then carry on: 1254 / 665

Moving on to step 4:
If we divide 1254 by 665, we get 1 and a remainder of 589.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 665 from 1254 to get 589.
Fetch the next digit (6) from the dividend, attach it to 589 and continue: 5896 / 665

Advancing to step 5:
If we divide 5896 by 665, we get 8 and a remainder of 576.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
The remainder is 576 after subtracting 5320 from 5896.
Append the next digit (1) from the dividend to 576 and continue with: 5761 / 665

Advancing to step 6:
665 can be fit into 5761 8 times, resulting in a remainder of 441.
Use 8 as the next digit of our solution. 
Result so far: 188.0
Subtracting 5320 from 5761 leaves us with 441.
Grab the next digit (7) from the dividend, add it to 441, then carry on: 4417 / 665

Moving on to step 7:
The number 665 fits into 4417 6 times, leaving a remainder of 427.
The number 6 becomes the next digit in our result. 
Result so far: 1886.0
Subtracting 3990 from 4417 leaves us with 427.
Include the next digit (3) from the dividend after 427, then repeat: 4273 / 665

Going ahead to step 8:
When dividing 4273 by 665, we get 6 with a remainder of 283.
Use 6 as the next digit of our solution. 
Result so far: 18866.0
Subtracting 3990 from 4273 leaves us with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

On to step 9:
The number 665 fits into 2830 4 times, leaving a remainder of 170.
Put 4 as the next digit of the answer. 
Result so far: 18866.4
Deduct 2660 from 2830 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 10:
When dividing 1700 by 665, we get 2 with a remainder of 370.
Use 2 as the next digit of our solution. 
Result so far: 18866.42
If we take 1330 away from 1700, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 11:
665 can be fit into 3700 5 times, resulting in a remainder of 375.
The number 5 becomes the next digit in our result. 
Result so far: 18866.425
The remainder is 375 after subtracting 3325 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Advancing to step 12:
The number 665 fits into 3750 5 times, leaving a remainder of 425.
Use 5 as the next digit of our solution. 
Result so far: 18866.4255
Subtract 3325 from 3750 to get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

The final outcome is 18866.4255, with a leftover of 0.00425.