16210587 ÷ 404 
We want to figure out the number of times 16210587 can be divided by 404.

Going ahead to step 1:
The number 404 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 404

Going ahead to step 2:
If we divide 16 by 404, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Bring next digit (2) of the dividend behind the 16 and repeat the process: 162 / 404

Let's proceed to step 3:
When dividing 162 by 404, we get 0 with a remainder of 162.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 162 after subtracting 0 from 162.
Fetch the next digit (1) from the dividend, attach it to 162 and continue: 1621 / 404

Going ahead to step 4:
404 can be fit into 1621 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 1616 from 1621 and we're left with 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 404

Step 5:
50 divided by 404 is 0 with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
If we take 0 away from 50, we end up with 50.
Take the next digit (5) from the dividend and append it to 50, then repeat: 505 / 404

On to step 6:
505 divided by 404 is 1 with a remainder of 101.
The next digit of our result is 1. 
Result so far: 401.0
Subtract 404 from 505 to get 101.
Bring next digit (8) of the dividend behind the 101 and repeat the process: 1018 / 404

Moving on to step 7:
404 goes into 1018 2 times with a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 4012.0
Subtract 808 from 1018 to get 210.
Fetch the next digit (7) from the dividend, attach it to 210 and continue: 2107 / 404

On to step 8:
When dividing 2107 by 404, we get 5 with a remainder of 87.
Write down 5 as next digit of the result. 
Result so far: 40125.0
Subtract 2020 from 2107 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 9:
870 divided by 404 is 2 with a remainder of 62.
The next digit of our result is 2. 
Result so far: 40125.2
Deduct 808 from 870 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 10:
404 goes into 620 1 times with a remainder of 216.
Put 1 as the next digit of the answer. 
Result so far: 40125.21
The remainder is 216 after subtracting 404 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Step 11:
When dividing 2160 by 404, we get 5 with a remainder of 140.
Write down 5 as next digit of the result. 
Result so far: 40125.215
The remainder is 140 after subtracting 2020 from 2160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 12:
404 goes into 1400 3 times with a remainder of 188.
Put 3 as the next digit of the answer. 
Result so far: 40125.2153
If we subtract 1212 from 1400, we get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 13:
404 goes into 1880 4 times with a remainder of 264.
The number 4 becomes the next digit in our result. 
Result so far: 40125.21534
If we subtract 1616 from 1880, we get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Going ahead to step 14:
404 can be fit into 2640 6 times, resulting in a remainder of 216.
The number 6 becomes the next digit in our result. 
Result so far: 40125.215346
Subtract 2424 from 2640 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Advancing to step 15:
404 can be fit into 2160 5 times, resulting in a remainder of 140.
Record the quotient 5 as the next digit in the result. 
Result so far: 40125.2153465
If we take 2020 away from 2160, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 16:
When dividing 1400 by 404, we get 3 with a remainder of 188.
Use 3 as the next digit of our solution. 
Result so far: 40125.21534653
Subtract 1212 from 1400 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final result is 40125.21534653 with a remainder of 1.88e-07.