21815484 ÷ 689 
We're looking to find how many times 689 goes into 21815484.

Let's proceed to step 1:
689 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 689

Moving on to step 2:
689 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Bring next digit (8) of the dividend behind the 21 and repeat the process: 218 / 689

Moving on to step 3:
218 divided by 689 is 0 with a remainder of 218.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 218, we get 218.
Grab the next digit (1) from the dividend, add it to 218, then carry on: 2181 / 689

On to step 4:
If we divide 2181 by 689, we get 3 and a remainder of 114.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 2067 from 2181 to get 114.
Grab the next digit (5) from the dividend, add it to 114, then carry on: 1145 / 689

Let's proceed to step 5:
1145 divided by 689 is 1 with a remainder of 456.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
If we take 689 away from 1145, we end up with 456.
Grab the next digit (4) from the dividend, add it to 456, then carry on: 4564 / 689

Advancing to step 6:
If we divide 4564 by 689, we get 6 and a remainder of 430.
Record the quotient 6 as the next digit in the result. 
Result so far: 316.0
Deduct 4134 from 4564 and we're left with 430.
Bring next digit (8) of the dividend behind the 430 and repeat the process: 4308 / 689

Let's proceed to step 7:
The number 689 fits into 4308 6 times, leaving a remainder of 174.
Put 6 as the next digit of the answer. 
Result so far: 3166.0
Subtracting 4134 from 4308 leaves us with 174.
Grab the next digit (4) from the dividend, add it to 174, then carry on: 1744 / 689

Moving on to step 8:
If we divide 1744 by 689, we get 2 and a remainder of 366.
Put 2 as the next digit of the answer. 
Result so far: 31662.0
The remainder is 366 after subtracting 1378 from 1744.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 9:
689 goes into 3660 5 times with a remainder of 215.
Put 5 as the next digit of the answer. 
Result so far: 31662.5
Subtracting 3445 from 3660 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 10:
2150 divided by 689 is 3 with a remainder of 83.
Use 3 as the next digit of our solution. 
Result so far: 31662.53
Deduct 2067 from 2150 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Let's proceed to step 11:
The number 689 fits into 830 1 times, leaving a remainder of 141.
The number 1 becomes the next digit in our result. 
Result so far: 31662.531
The remainder is 141 after subtracting 689 from 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 12:
689 goes into 1410 2 times with a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 31662.5312
If we take 1378 away from 1410, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
The number 689 fits into 320 0 times, leaving a remainder of 320.
The next digit of our result is 0. 
Result so far: 31662.5312
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 14:
689 goes into 3200 4 times with a remainder of 444.
Write down 4 as next digit of the result. 
Result so far: 31662.531204
Deduct 2756 from 3200 and we're left with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Step 15:
4440 divided by 689 is 6 with a remainder of 306.
Use 6 as the next digit of our solution. 
Result so far: 31662.5312046
If we take 4134 away from 4440, we end up with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Going ahead to step 16:
If we divide 3060 by 689, we get 4 and a remainder of 304.
Use 4 as the next digit of our solution. 
Result so far: 31662.53120464
The remainder is 304 after subtracting 2756 from 3060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

After the division, we end up with 31662.53120464 and a remainder of 3.04e-07.