21170142 ÷ 253 
We want to figure out the number of times 21170142 can be divided by 253.

On to step 1:
If we divide 2 by 253, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 253

Moving on to step 2:
The number 253 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 253

Advancing to step 3:
The number 253 fits into 211 0 times, leaving a remainder of 211.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 211, we get 211.
Append the next digit (7) from the dividend to 211 and continue with: 2117 / 253

Step 4:
253 can be fit into 2117 8 times, resulting in a remainder of 93.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 93 after subtracting 2024 from 2117.
Fetch the next digit (0) from the dividend, attach it to 93 and continue: 930 / 253

Step 5:
253 goes into 930 3 times with a remainder of 171.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Subtract 759 from 930 to get 171.
Fetch the next digit (1) from the dividend, attach it to 171 and continue: 1711 / 253

Step 6:
253 goes into 1711 6 times with a remainder of 193.
Put 6 as the next digit of the answer. 
Result so far: 836.0
If we take 1518 away from 1711, we end up with 193.
Bring next digit (4) of the dividend behind the 193 and repeat the process: 1934 / 253

Moving on to step 7:
253 can be fit into 1934 7 times, resulting in a remainder of 163.
Use 7 as the next digit of our solution. 
Result so far: 8367.0
The remainder is 163 after subtracting 1771 from 1934.
Include the next digit (2) from the dividend after 163, then repeat: 1632 / 253

Let's proceed to step 8:
If we divide 1632 by 253, we get 6 and a remainder of 114.
Write down 6 as next digit of the result. 
Result so far: 83676.0
Subtracting 1518 from 1632 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Going ahead to step 9:
The number 253 fits into 1140 4 times, leaving a remainder of 128.
Record the quotient 4 as the next digit in the result. 
Result so far: 83676.4
If we subtract 1012 from 1140, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 10:
1280 divided by 253 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 83676.45
Subtracting 1265 from 1280 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
253 can be fit into 150 0 times, resulting in a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 83676.45
If we subtract 0 from 150, we 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.

Advancing to step 12:
If we divide 1500 by 253, we get 5 and a remainder of 235.
The next digit of our result is 5. 
Result so far: 83676.4505
Subtract 1265 from 1500 to get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Going ahead to step 13:
When dividing 2350 by 253, we get 9 with a remainder of 73.
Put 9 as the next digit of the answer. 
Result so far: 83676.45059
The remainder is 73 after subtracting 2277 from 2350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 14:
When dividing 730 by 253, we get 2 with a remainder of 224.
Write down 2 as next digit of the result. 
Result so far: 83676.450592
Subtracting 506 from 730 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 15:
If we divide 2240 by 253, we get 8 and a remainder of 216.
Write down 8 as next digit of the result. 
Result so far: 83676.4505928
The remainder is 216 after subtracting 2024 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 16:
The number 253 fits into 2160 8 times, leaving a remainder of 136.
The next digit of our result is 8. 
Result so far: 83676.45059288
If we subtract 2024 from 2160, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

In conclusion, the division gives 83676.45059288 with a balance of 1.36e-07.