13996607 divided by 646 
We're looking to find how many times 646 goes into 13996607.

Moving on to step 1:
When dividing 1 by 646, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 646

Step 2:
646 goes into 13 0 times with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 646

Step 3:
If we divide 139 by 646, we get 0 and a remainder of 139.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 139 and we're left with 139.
Append the next digit (9) from the dividend to 139 and continue with: 1399 / 646

Advancing to step 4:
646 can be fit into 1399 2 times, resulting in a remainder of 107.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1292 from 1399 and we're left with 107.
Append the next digit (6) from the dividend to 107 and continue with: 1076 / 646

Step 5:
646 goes into 1076 1 times with a remainder of 430.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 430 after subtracting 646 from 1076.
Append the next digit (6) from the dividend to 430 and continue with: 4306 / 646

Advancing to step 6:
646 can be fit into 4306 6 times, resulting in a remainder of 430.
The number 6 becomes the next digit in our result. 
Result so far: 216.0
The remainder is 430 after subtracting 3876 from 4306.
Include the next digit (0) from the dividend after 430, then repeat: 4300 / 646

On to step 7:
4300 divided by 646 is 6 with a remainder of 424.
The next digit of our result is 6. 
Result so far: 2166.0
The remainder is 424 after subtracting 3876 from 4300.
Include the next digit (7) from the dividend after 424, then repeat: 4247 / 646

Going ahead to step 8:
4247 divided by 646 is 6 with a remainder of 371.
Put 6 as the next digit of the answer. 
Result so far: 21666.0
Subtract 3876 from 4247 to get 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Moving on to step 9:
646 goes into 3710 5 times with a remainder of 480.
The next digit of our result is 5. 
Result so far: 21666.5
Deduct 3230 from 3710 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 10:
4800 divided by 646 is 7 with a remainder of 278.
Record the quotient 7 as the next digit in the result. 
Result so far: 21666.57
If we subtract 4522 from 4800, we get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Let's proceed to step 11:
646 goes into 2780 4 times with a remainder of 196.
The number 4 becomes the next digit in our result. 
Result so far: 21666.574
If we take 2584 away from 2780, we end up with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 12:
646 can be fit into 1960 3 times, resulting in a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 21666.5743
The remainder is 22 after subtracting 1938 from 1960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
646 goes into 220 0 times with a remainder of 220.
Use 0 as the next digit of our solution. 
Result so far: 21666.5743
If we take 0 away from 220, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 14:
If we divide 2200 by 646, we get 3 and a remainder of 262.
The number 3 becomes the next digit in our result. 
Result so far: 21666.574303
Subtracting 1938 from 2200 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Advancing to step 15:
When dividing 2620 by 646, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 21666.5743034
If we take 2584 away from 2620, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 16:
The number 646 fits into 360 0 times, leaving a remainder of 360.
Record the quotient 0 as the next digit in the result. 
Result so far: 21666.5743034
The remainder is 360 after subtracting 0 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

The quotient of the division is 21666.5743034, and the remainder is 3.6e-07.