21175201 divided by 850 
We want to figure out the number of times 21175201 can be divided by 850.

Step 1:
The number 850 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 850

On to step 2:
When dividing 21 by 850, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 850

Let's proceed to step 3:
211 divided by 850 is 0 with a remainder of 211.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 211, we get 211.
Include the next digit (7) from the dividend after 211, then repeat: 2117 / 850

Moving on to step 4:
850 can be fit into 2117 2 times, resulting in a remainder of 417.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 1700 from 2117 leaves us with 417.
Fetch the next digit (5) from the dividend, attach it to 417 and continue: 4175 / 850

Advancing to step 5:
850 can be fit into 4175 4 times, resulting in a remainder of 775.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we take 3400 away from 4175, we end up with 775.
Include the next digit (2) from the dividend after 775, then repeat: 7752 / 850

Advancing to step 6:
850 can be fit into 7752 9 times, resulting in a remainder of 102.
Write down 9 as next digit of the result. 
Result so far: 249.0
If we subtract 7650 from 7752, we get 102.
Bring next digit (0) of the dividend behind the 102 and repeat the process: 1020 / 850

Moving on to step 7:
1020 divided by 850 is 1 with a remainder of 170.
Write down 1 as next digit of the result. 
Result so far: 2491.0
Subtract 850 from 1020 to get 170.
Include the next digit (1) from the dividend after 170, then repeat: 1701 / 850

Advancing to step 8:
When dividing 1701 by 850, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 24912.0
Deduct 1700 from 1701 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
The number 850 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 24912.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
When dividing 100 by 850, we get 0 with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 24912.0
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

After the division, we end up with 24912.0 and a remainder of 0.1.