21050395 ÷ 287 
We're looking to find how many times 287 goes into 21050395.

On to step 1:
If we divide 2 by 287, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 287

On to step 2:
If we divide 21 by 287, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 287

Let's proceed to step 3:
287 goes into 210 0 times with a remainder of 210.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 210, we get 210.
Bring next digit (5) of the dividend behind the 210 and repeat the process: 2105 / 287

Let's proceed to step 4:
The number 287 fits into 2105 7 times, leaving a remainder of 96.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 96 after subtracting 2009 from 2105.
Bring next digit (0) of the dividend behind the 96 and repeat the process: 960 / 287

Advancing to step 5:
The number 287 fits into 960 3 times, leaving a remainder of 99.
Record the quotient 3 as the next digit in the result. 
Result so far: 73.0
If we take 861 away from 960, we end up with 99.
Take the next digit (3) from the dividend and append it to 99, then repeat: 993 / 287

Moving on to step 6:
When dividing 993 by 287, we get 3 with a remainder of 132.
Record the quotient 3 as the next digit in the result. 
Result so far: 733.0
Deduct 861 from 993 and we're left with 132.
Bring next digit (9) of the dividend behind the 132 and repeat the process: 1329 / 287

Step 7:
If we divide 1329 by 287, we get 4 and a remainder of 181.
The next digit of our result is 4. 
Result so far: 7334.0
If we take 1148 away from 1329, we end up with 181.
Take the next digit (5) from the dividend and append it to 181, then repeat: 1815 / 287

Moving on to step 8:
If we divide 1815 by 287, we get 6 and a remainder of 93.
Put 6 as the next digit of the answer. 
Result so far: 73346.0
Deduct 1722 from 1815 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 9:
930 divided by 287 is 3 with a remainder of 69.
The next digit of our result is 3. 
Result so far: 73346.3
Deduct 861 from 930 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 10:
When dividing 690 by 287, we get 2 with a remainder of 116.
The number 2 becomes the next digit in our result. 
Result so far: 73346.32
Deduct 574 from 690 and we're left with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 11:
287 can be fit into 1160 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 73346.324
If we take 1148 away from 1160, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
When dividing 120 by 287, we get 0 with a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 73346.324
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 13:
The number 287 fits into 1200 4 times, leaving a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 73346.32404
Subtract 1148 from 1200 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 14:
When dividing 520 by 287, we get 1 with a remainder of 233.
The number 1 becomes the next digit in our result. 
Result so far: 73346.324041
If we subtract 287 from 520, we get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Moving on to step 15:
287 goes into 2330 8 times with a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 73346.3240418
Deduct 2296 from 2330 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 16:
340 divided by 287 is 1 with a remainder of 53.
Record the quotient 1 as the next digit in the result. 
Result so far: 73346.32404181
If we take 287 away from 340, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

After the division, we end up with 73346.32404181 and a remainder of 5.3e-08.