We're dividing 16865089 by 401 
Let's see how many times 401 fits into 16865089.

On to step 1:
The number 401 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 401

On to step 2:
If we divide 16 by 401, we get 0 and a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 401

On to step 3:
When dividing 168 by 401, we get 0 with a remainder of 168.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 168, we end up with 168.
Include the next digit (6) from the dividend after 168, then repeat: 1686 / 401

Going ahead to step 4:
When dividing 1686 by 401, we get 4 with a remainder of 82.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 1604 from 1686, we get 82.
Fetch the next digit (5) from the dividend, attach it to 82 and continue: 825 / 401

Advancing to step 5:
If we divide 825 by 401, we get 2 and a remainder of 23.
The next digit of our result is 2. 
Result so far: 42.0
If we take 802 away from 825, we end up with 23.
Fetch the next digit (0) from the dividend, attach it to 23 and continue: 230 / 401

Advancing to step 6:
401 can be fit into 230 0 times, resulting in a remainder of 230.
The next digit of our result is 0. 
Result so far: 420.0
Subtracting 0 from 230 leaves us with 230.
Bring next digit (8) of the dividend behind the 230 and repeat the process: 2308 / 401

On to step 7:
When dividing 2308 by 401, we get 5 with a remainder of 303.
Put 5 as the next digit of the answer. 
Result so far: 4205.0
Subtracting 2005 from 2308 leaves us with 303.
Fetch the next digit (9) from the dividend, attach it to 303 and continue: 3039 / 401

Advancing to step 8:
401 can be fit into 3039 7 times, resulting in a remainder of 232.
Write down 7 as next digit of the result. 
Result so far: 42057.0
If we subtract 2807 from 3039, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 9:
401 can be fit into 2320 5 times, resulting in a remainder of 315.
Use 5 as the next digit of our solution. 
Result so far: 42057.5
Subtract 2005 from 2320 to get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Moving on to step 10:
If we divide 3150 by 401, we get 7 and a remainder of 343.
Put 7 as the next digit of the answer. 
Result so far: 42057.57
Subtracting 2807 from 3150 leaves us with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Step 11:
401 can be fit into 3430 8 times, resulting in a remainder of 222.
Record the quotient 8 as the next digit in the result. 
Result so far: 42057.578
Subtract 3208 from 3430 to get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Advancing to step 12:
When dividing 2220 by 401, we get 5 with a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 42057.5785
If we subtract 2005 from 2220, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Going ahead to step 13:
The number 401 fits into 2150 5 times, leaving a remainder of 145.
The next digit of our result is 5. 
Result so far: 42057.57855
If we subtract 2005 from 2150, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

The final result is 42057.57855 with a remainder of 0.000145.