21066701 ÷ 853 
Let's see how many times 853 fits into 21066701.

On to step 1:
If we divide 2 by 853, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 853

Moving on to step 2:
853 can be fit into 21 0 times, resulting in a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 853

Moving on to step 3:
If we divide 210 by 853, we get 0 and a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 210 to get 210.
Include the next digit (6) from the dividend after 210, then repeat: 2106 / 853

Step 4:
2106 divided by 853 is 2 with a remainder of 400.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1706 from 2106 to get 400.
Fetch the next digit (6) from the dividend, attach it to 400 and continue: 4006 / 853

On to step 5:
The number 853 fits into 4006 4 times, leaving a remainder of 594.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtract 3412 from 4006 to get 594.
Grab the next digit (7) from the dividend, add it to 594, then carry on: 5947 / 853

Going ahead to step 6:
The number 853 fits into 5947 6 times, leaving a remainder of 829.
The number 6 becomes the next digit in our result. 
Result so far: 246.0
The remainder is 829 after subtracting 5118 from 5947.
Append the next digit (0) from the dividend to 829 and continue with: 8290 / 853

Moving on to step 7:
The number 853 fits into 8290 9 times, leaving a remainder of 613.
The number 9 becomes the next digit in our result. 
Result so far: 2469.0
If we take 7677 away from 8290, we end up with 613.
Append the next digit (1) from the dividend to 613 and continue with: 6131 / 853

Advancing to step 8:
6131 divided by 853 is 7 with a remainder of 160.
The number 7 becomes the next digit in our result. 
Result so far: 24697.0
Subtract 5971 from 6131 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 9:
853 can be fit into 1600 1 times, resulting in a remainder of 747.
Put 1 as the next digit of the answer. 
Result so far: 24697.1
If we subtract 853 from 1600, we get 747.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7470, and continue the process.

Moving on to step 10:
7470 divided by 853 is 8 with a remainder of 646.
Put 8 as the next digit of the answer. 
Result so far: 24697.18
Subtracting 6824 from 7470 leaves us with 646.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

Let's proceed to step 11:
6460 divided by 853 is 7 with a remainder of 489.
Put 7 as the next digit of the answer. 
Result so far: 24697.187
The remainder is 489 after subtracting 5971 from 6460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

On to step 12:
The number 853 fits into 4890 5 times, leaving a remainder of 625.
Write down 5 as next digit of the result. 
Result so far: 24697.1875
If we take 4265 away from 4890, we end up with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Let's proceed to step 13:
853 can be fit into 6250 7 times, resulting in a remainder of 279.
Record the quotient 7 as the next digit in the result. 
Result so far: 24697.18757
Deduct 5971 from 6250 and we're left with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Going ahead to step 14:
The number 853 fits into 2790 3 times, leaving a remainder of 231.
Put 3 as the next digit of the answer. 
Result so far: 24697.187573
Deduct 2559 from 2790 and we're left with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Let's proceed to step 15:
If we divide 2310 by 853, we get 2 and a remainder of 604.
Use 2 as the next digit of our solution. 
Result so far: 24697.1875732
Subtracting 1706 from 2310 leaves us with 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Going ahead to step 16:
The number 853 fits into 6040 7 times, leaving a remainder of 69.
The next digit of our result is 7. 
Result so far: 24697.18757327
If we subtract 5971 from 6040, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The final result is 24697.18757327 with a remainder of 6.9e-08.