We're dividing 21525874 by 680 
We're looking to find how many times 680 goes into 21525874.

Step 1:
680 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 680

Step 2:
When dividing 21 by 680, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 680

Going ahead to step 3:
680 goes into 215 0 times with a remainder of 215.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 215, we get 215.
Take the next digit (2) from the dividend and append it to 215, then repeat: 2152 / 680

Going ahead to step 4:
If we divide 2152 by 680, we get 3 and a remainder of 112.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 2040 from 2152 to get 112.
Fetch the next digit (5) from the dividend, attach it to 112 and continue: 1125 / 680

Moving on to step 5:
680 goes into 1125 1 times with a remainder of 445.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we subtract 680 from 1125, we get 445.
Take the next digit (8) from the dividend and append it to 445, then repeat: 4458 / 680

Moving on to step 6:
If we divide 4458 by 680, we get 6 and a remainder of 378.
The next digit of our result is 6. 
Result so far: 316.0
Subtracting 4080 from 4458 leaves us with 378.
Bring next digit (7) of the dividend behind the 378 and repeat the process: 3787 / 680

Advancing to step 7:
When dividing 3787 by 680, we get 5 with a remainder of 387.
Put 5 as the next digit of the answer. 
Result so far: 3165.0
If we subtract 3400 from 3787, we get 387.
Take the next digit (4) from the dividend and append it to 387, then repeat: 3874 / 680

Step 8:
680 goes into 3874 5 times with a remainder of 474.
The number 5 becomes the next digit in our result. 
Result so far: 31655.0
Subtract 3400 from 3874 to get 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Moving on to step 9:
When dividing 4740 by 680, we get 6 with a remainder of 660.
The number 6 becomes the next digit in our result. 
Result so far: 31655.6
Subtract 4080 from 4740 to get 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Moving on to step 10:
When dividing 6600 by 680, we get 9 with a remainder of 480.
Record the quotient 9 as the next digit in the result. 
Result so far: 31655.69
Subtracting 6120 from 6600 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 11:
680 can be fit into 4800 7 times, resulting in a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 31655.697
If we take 4760 away from 4800, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
400 divided by 680 is 0 with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 31655.697
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 13:
If we divide 4000 by 680, we get 5 and a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 31655.69705
Subtract 3400 from 4000 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

On to step 14:
The number 680 fits into 6000 8 times, leaving a remainder of 560.
Record the quotient 8 as the next digit in the result. 
Result so far: 31655.697058
Deduct 5440 from 6000 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 15:
680 goes into 5600 8 times with a remainder of 160.
Record the quotient 8 as the next digit in the result. 
Result so far: 31655.6970588
If we take 5440 away from 5600, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

After the division, we end up with 31655.6970588 and a remainder of 1.6e-06.