21577545 ÷ 684 
We want to divide 21577545 by 684.

Step 1:
When dividing 2 by 684, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 684

Step 2:
If we divide 21 by 684, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 684

Step 3:
215 divided by 684 is 0 with a remainder of 215.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 215, we end up with 215.
Include the next digit (7) from the dividend after 215, then repeat: 2157 / 684

Let's proceed to step 4:
2157 divided by 684 is 3 with a remainder of 105.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 2052 from 2157 and we're left with 105.
Append the next digit (7) from the dividend to 105 and continue with: 1057 / 684

Going ahead to step 5:
When dividing 1057 by 684, we get 1 with a remainder of 373.
Write down 1 as next digit of the result. 
Result so far: 31.0
Subtracting 684 from 1057 leaves us with 373.
Fetch the next digit (5) from the dividend, attach it to 373 and continue: 3735 / 684

Going ahead to step 6:
684 can be fit into 3735 5 times, resulting in a remainder of 315.
Write down 5 as next digit of the result. 
Result so far: 315.0
The remainder is 315 after subtracting 3420 from 3735.
Bring next digit (4) of the dividend behind the 315 and repeat the process: 3154 / 684

Going ahead to step 7:
3154 divided by 684 is 4 with a remainder of 418.
Put 4 as the next digit of the answer. 
Result so far: 3154.0
If we subtract 2736 from 3154, we get 418.
Include the next digit (5) from the dividend after 418, then repeat: 4185 / 684

Moving on to step 8:
684 goes into 4185 6 times with a remainder of 81.
Write down 6 as next digit of the result. 
Result so far: 31546.0
Subtract 4104 from 4185 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 9:
When dividing 810 by 684, we get 1 with a remainder of 126.
The next digit of our result is 1. 
Result so far: 31546.1
Subtract 684 from 810 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 10:
When dividing 1260 by 684, we get 1 with a remainder of 576.
The next digit of our result is 1. 
Result so far: 31546.11
Deduct 684 from 1260 and we're left with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

The final result is 31546.11 with a remainder of 0.576.