21582515 divided by 279 
We're looking to find how many times 279 goes into 21582515.

Let's proceed to step 1:
2 divided by 279 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 279

Moving on to step 2:
21 divided by 279 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 279

Step 3:
The number 279 fits into 215 0 times, leaving a remainder of 215.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 215 leaves us with 215.
Bring next digit (8) of the dividend behind the 215 and repeat the process: 2158 / 279

Moving on to step 4:
If we divide 2158 by 279, we get 7 and a remainder of 205.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 1953 away from 2158, we end up with 205.
Append the next digit (2) from the dividend to 205 and continue with: 2052 / 279

On to step 5:
2052 divided by 279 is 7 with a remainder of 99.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
The remainder is 99 after subtracting 1953 from 2052.
Take the next digit (5) from the dividend and append it to 99, then repeat: 995 / 279

On to step 6:
995 divided by 279 is 3 with a remainder of 158.
Put 3 as the next digit of the answer. 
Result so far: 773.0
Subtracting 837 from 995 leaves us with 158.
Fetch the next digit (1) from the dividend, attach it to 158 and continue: 1581 / 279

Going ahead to step 7:
279 goes into 1581 5 times with a remainder of 186.
Put 5 as the next digit of the answer. 
Result so far: 7735.0
Deduct 1395 from 1581 and we're left with 186.
Fetch the next digit (5) from the dividend, attach it to 186 and continue: 1865 / 279

Moving on to step 8:
If we divide 1865 by 279, we get 6 and a remainder of 191.
Record the quotient 6 as the next digit in the result. 
Result so far: 77356.0
Subtracting 1674 from 1865 leaves us with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Advancing to step 9:
279 can be fit into 1910 6 times, resulting in a remainder of 236.
Put 6 as the next digit of the answer. 
Result so far: 77356.6
Subtract 1674 from 1910 to get 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

On to step 10:
2360 divided by 279 is 8 with a remainder of 128.
Use 8 as the next digit of our solution. 
Result so far: 77356.68
Subtract 2232 from 2360 to 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.

On to step 11:
If we divide 1280 by 279, we get 4 and a remainder of 164.
Put 4 as the next digit of the answer. 
Result so far: 77356.684
If we take 1116 away from 1280, we end up with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Moving on to step 12:
279 can be fit into 1640 5 times, resulting in a remainder of 245.
The next digit of our result is 5. 
Result so far: 77356.6845
Deduct 1395 from 1640 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Moving on to step 13:
279 can be fit into 2450 8 times, resulting in a remainder of 218.
The next digit of our result is 8. 
Result so far: 77356.68458
If we take 2232 away from 2450, we end up with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 14:
2180 divided by 279 is 7 with a remainder of 227.
Record the quotient 7 as the next digit in the result. 
Result so far: 77356.684587
If we take 1953 away from 2180, we end up with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Moving on to step 15:
279 can be fit into 2270 8 times, resulting in a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 77356.6845878
Deduct 2232 from 2270 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 16:
279 can be fit into 380 1 times, resulting in a remainder of 101.
Use 1 as the next digit of our solution. 
Result so far: 77356.68458781
The remainder is 101 after subtracting 279 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

The quotient of the division is 77356.68458781, and the remainder is 1.01e-07.