13425640 divided by 166 
We want to figure out the number of times 13425640 can be divided by 166.

Advancing to step 1:
When dividing 1 by 166, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 166

On to step 2:
166 can be fit into 13 0 times, resulting in a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 166

Step 3:
When dividing 134 by 166, we get 0 with a remainder of 134.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 134 and we're left with 134.
Include the next digit (2) from the dividend after 134, then repeat: 1342 / 166

Let's proceed to step 4:
The number 166 fits into 1342 8 times, leaving a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 1328 from 1342 to get 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 166

On to step 5:
166 can be fit into 145 0 times, resulting in a remainder of 145.
Use 0 as the next digit of our solution. 
Result so far: 80.0
If we take 0 away from 145, we end up with 145.
Fetch the next digit (6) from the dividend, attach it to 145 and continue: 1456 / 166

Going ahead to step 6:
166 goes into 1456 8 times with a remainder of 128.
Record the quotient 8 as the next digit in the result. 
Result so far: 808.0
If we take 1328 away from 1456, we end up with 128.
Fetch the next digit (4) from the dividend, attach it to 128 and continue: 1284 / 166

Moving on to step 7:
1284 divided by 166 is 7 with a remainder of 122.
Put 7 as the next digit of the answer. 
Result so far: 8087.0
If we subtract 1162 from 1284, we get 122.
Bring next digit (0) of the dividend behind the 122 and repeat the process: 1220 / 166

On to step 8:
1220 divided by 166 is 7 with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 80877.0
If we subtract 1162 from 1220, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 9:
166 goes into 580 3 times with a remainder of 82.
The next digit of our result is 3. 
Result so far: 80877.3
Deduct 498 from 580 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 10:
The number 166 fits into 820 4 times, leaving a remainder of 156.
The next digit of our result is 4. 
Result so far: 80877.34
The remainder is 156 after subtracting 664 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 11:
1560 divided by 166 is 9 with a remainder of 66.
Put 9 as the next digit of the answer. 
Result so far: 80877.349
If we take 1494 away from 1560, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 12:
When dividing 660 by 166, we get 3 with a remainder of 162.
Use 3 as the next digit of our solution. 
Result so far: 80877.3493
The remainder is 162 after subtracting 498 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Moving on to step 13:
166 can be fit into 1620 9 times, resulting in a remainder of 126.
Record the quotient 9 as the next digit in the result. 
Result so far: 80877.34939
Subtracting 1494 from 1620 leaves us with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 14:
When dividing 1260 by 166, we get 7 with a remainder of 98.
Put 7 as the next digit of the answer. 
Result so far: 80877.349397
If we subtract 1162 from 1260, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 15:
980 divided by 166 is 5 with a remainder of 150.
Write down 5 as next digit of the result. 
Result so far: 80877.3493975
Subtract 830 from 980 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 16:
The number 166 fits into 1500 9 times, leaving a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 80877.34939759
Deduct 1494 from 1500 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.

After the division, we end up with 80877.34939759 and a remainder of 6e-09.