21570220 ÷ 834 
We want to figure out the number of times 21570220 can be divided by 834.

Step 1:
834 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 834

Advancing to step 2:
834 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 834

Step 3:
If we divide 215 by 834, we get 0 and a remainder of 215.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 215 after subtracting 0 from 215.
Take the next digit (7) from the dividend and append it to 215, then repeat: 2157 / 834

Step 4:
834 can be fit into 2157 2 times, resulting in a remainder of 489.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1668 from 2157 and we're left with 489.
Bring next digit (0) of the dividend behind the 489 and repeat the process: 4890 / 834

Going ahead to step 5:
834 goes into 4890 5 times with a remainder of 720.
Write down 5 as next digit of the result. 
Result so far: 25.0
Subtracting 4170 from 4890 leaves us with 720.
Fetch the next digit (2) from the dividend, attach it to 720 and continue: 7202 / 834

Advancing to step 6:
The number 834 fits into 7202 8 times, leaving a remainder of 530.
Use 8 as the next digit of our solution. 
Result so far: 258.0
Subtracting 6672 from 7202 leaves us with 530.
Append the next digit (2) from the dividend to 530 and continue with: 5302 / 834

Step 7:
834 can be fit into 5302 6 times, resulting in a remainder of 298.
Put 6 as the next digit of the answer. 
Result so far: 2586.0
The remainder is 298 after subtracting 5004 from 5302.
Fetch the next digit (0) from the dividend, attach it to 298 and continue: 2980 / 834

Step 8:
The number 834 fits into 2980 3 times, leaving a remainder of 478.
The number 3 becomes the next digit in our result. 
Result so far: 25863.0
Subtracting 2502 from 2980 leaves us with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Going ahead to step 9:
4780 divided by 834 is 5 with a remainder of 610.
Write down 5 as next digit of the result. 
Result so far: 25863.5
Deduct 4170 from 4780 and we're left with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Step 10:
834 can be fit into 6100 7 times, resulting in a remainder of 262.
Record the quotient 7 as the next digit in the result. 
Result so far: 25863.57
If we subtract 5838 from 6100, we get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Going ahead to step 11:
The number 834 fits into 2620 3 times, leaving a remainder of 118.
Write down 3 as next digit of the result. 
Result so far: 25863.573
If we take 2502 away from 2620, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 12:
834 goes into 1180 1 times with a remainder of 346.
Record the quotient 1 as the next digit in the result. 
Result so far: 25863.5731
Subtracting 834 from 1180 leaves us with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Moving on to step 13:
834 goes into 3460 4 times with a remainder of 124.
The next digit of our result is 4. 
Result so far: 25863.57314
If we take 3336 away from 3460, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Step 14:
1240 divided by 834 is 1 with a remainder of 406.
The next digit of our result is 1. 
Result so far: 25863.573141
Subtracting 834 from 1240 leaves us with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Advancing to step 15:
4060 divided by 834 is 4 with a remainder of 724.
Use 4 as the next digit of our solution. 
Result so far: 25863.5731414
If we subtract 3336 from 4060, we get 724.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Moving on to step 16:
7240 divided by 834 is 8 with a remainder of 568.
The number 8 becomes the next digit in our result. 
Result so far: 25863.57314148
Subtracting 6672 from 7240 leaves us with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

After the division, we end up with 25863.57314148 and a remainder of 5.68e-07.