Let's divide 13993290 by 866
We want to figure out the number of times 13993290 can be divided by 866.

Advancing to step 1:
1 divided by 866 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 866

Going ahead to step 2:
When dividing 13 by 866, we get 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 866

On to step 3:
866 can be fit into 139 0 times, resulting in a remainder of 139.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 139 leaves us with 139.
Take the next digit (9) from the dividend and append it to 139, then repeat: 1399 / 866

Let's proceed to step 4:
If we divide 1399 by 866, we get 1 and a remainder of 533.
The next digit of our result is 1. 
Result so far: 1.0
If we take 866 away from 1399, we end up with 533.
Append the next digit (3) from the dividend to 533 and continue with: 5333 / 866

Advancing to step 5:
When dividing 5333 by 866, we get 6 with a remainder of 137.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we take 5196 away from 5333, we end up with 137.
Fetch the next digit (2) from the dividend, attach it to 137 and continue: 1372 / 866

On to step 6:
If we divide 1372 by 866, we get 1 and a remainder of 506.
Use 1 as the next digit of our solution. 
Result so far: 161.0
If we subtract 866 from 1372, we get 506.
Fetch the next digit (9) from the dividend, attach it to 506 and continue: 5069 / 866

Moving on to step 7:
5069 divided by 866 is 5 with a remainder of 739.
Use 5 as the next digit of our solution. 
Result so far: 1615.0
Deduct 4330 from 5069 and we're left with 739.
Grab the next digit (0) from the dividend, add it to 739, then carry on: 7390 / 866

Moving on to step 8:
If we divide 7390 by 866, we get 8 and a remainder of 462.
Write down 8 as next digit of the result. 
Result so far: 16158.0
Subtract 6928 from 7390 to get 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Going ahead to step 9:
If we divide 4620 by 866, we get 5 and a remainder of 290.
Put 5 as the next digit of the answer. 
Result so far: 16158.5
Subtract 4330 from 4620 to get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Step 10:
866 can be fit into 2900 3 times, resulting in a remainder of 302.
Write down 3 as next digit of the result. 
Result so far: 16158.53
Subtracting 2598 from 2900 leaves us with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 11:
866 can be fit into 3020 3 times, resulting in a remainder of 422.
Record the quotient 3 as the next digit in the result. 
Result so far: 16158.533
The remainder is 422 after subtracting 2598 from 3020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

The final outcome is 16158.533, with a leftover of 0.0422.