21387671 divided by 812 
We want to divide 21387671 by 812.

Step 1:
2 divided by 812 is 0 with 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.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 812

Let's proceed to step 2:
812 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 812

Let's proceed to step 3:
213 divided by 812 is 0 with a remainder of 213.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 213, we get 213.
Grab the next digit (8) from the dividend, add it to 213, then carry on: 2138 / 812

Step 4:
812 can be fit into 2138 2 times, resulting in a remainder of 514.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 1624 from 2138, we get 514.
Grab the next digit (7) from the dividend, add it to 514, then carry on: 5147 / 812

Going ahead to step 5:
If we divide 5147 by 812, we get 6 and a remainder of 275.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
If we take 4872 away from 5147, we end up with 275.
Append the next digit (6) from the dividend to 275 and continue with: 2756 / 812

On to step 6:
If we divide 2756 by 812, we get 3 and a remainder of 320.
The next digit of our result is 3. 
Result so far: 263.0
If we take 2436 away from 2756, we end up with 320.
Grab the next digit (7) from the dividend, add it to 320, then carry on: 3207 / 812

Let's proceed to step 7:
The number 812 fits into 3207 3 times, leaving a remainder of 771.
Write down 3 as next digit of the result. 
Result so far: 2633.0
Subtract 2436 from 3207 to get 771.
Append the next digit (1) from the dividend to 771 and continue with: 7711 / 812

Advancing to step 8:
812 goes into 7711 9 times with a remainder of 403.
Use 9 as the next digit of our solution. 
Result so far: 26339.0
Deduct 7308 from 7711 and we're left with 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Moving on to step 9:
812 goes into 4030 4 times with a remainder of 782.
Use 4 as the next digit of our solution. 
Result so far: 26339.4
If we subtract 3248 from 4030, we get 782.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7820, and continue the process.

Step 10:
812 goes into 7820 9 times with a remainder of 512.
Record the quotient 9 as the next digit in the result. 
Result so far: 26339.49
Subtract 7308 from 7820 to get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Advancing to step 11:
The number 812 fits into 5120 6 times, leaving a remainder of 248.
Use 6 as the next digit of our solution. 
Result so far: 26339.496
If we take 4872 away from 5120, we end up with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Step 12:
2480 divided by 812 is 3 with a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 26339.4963
Subtracting 2436 from 2480 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 13:
812 goes into 440 0 times with a remainder of 440.
Put 0 as the next digit of the answer. 
Result so far: 26339.4963
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 14:
4400 divided by 812 is 5 with a remainder of 340.
Write down 5 as next digit of the result. 
Result so far: 26339.496305
Subtracting 4060 from 4400 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 15:
812 can be fit into 3400 4 times, resulting in a remainder of 152.
Record the quotient 4 as the next digit in the result. 
Result so far: 26339.4963054
If we take 3248 away from 3400, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Going ahead to step 16:
If we divide 1520 by 812, we get 1 and a remainder of 708.
Write down 1 as next digit of the result. 
Result so far: 26339.49630541
If we take 812 away from 1520, we end up with 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

The final outcome is 26339.49630541, with a leftover of 7.08e-07.