We look at the division of 21429845 by 688 
Our goal is to divide 21429845 by 688.

On to step 1:
688 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 688

Step 2:
The number 688 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 688

Going ahead to step 3:
The number 688 fits into 214 0 times, leaving a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Append the next digit (2) from the dividend to 214 and continue with: 2142 / 688

Going ahead to step 4:
When dividing 2142 by 688, we get 3 with a remainder of 78.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 2064 away from 2142, we end up with 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 688

Advancing to step 5:
If we divide 789 by 688, we get 1 and a remainder of 101.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
Subtract 688 from 789 to get 101.
Take the next digit (8) from the dividend and append it to 101, then repeat: 1018 / 688

Let's proceed to step 6:
When dividing 1018 by 688, we get 1 with a remainder of 330.
The number 1 becomes the next digit in our result. 
Result so far: 311.0
Subtract 688 from 1018 to get 330.
Take the next digit (4) from the dividend and append it to 330, then repeat: 3304 / 688

Moving on to step 7:
688 can be fit into 3304 4 times, resulting in a remainder of 552.
The number 4 becomes the next digit in our result. 
Result so far: 3114.0
Subtract 2752 from 3304 to get 552.
Append the next digit (5) from the dividend to 552 and continue with: 5525 / 688

Advancing to step 8:
5525 divided by 688 is 8 with a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 31148.0
Deduct 5504 from 5525 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
The number 688 fits into 210 0 times, leaving a remainder of 210.
The next digit of our result is 0. 
Result so far: 31148.0
Subtracting 0 from 210 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Advancing to step 10:
688 goes into 2100 3 times with a remainder of 36.
Record the quotient 3 as the next digit in the result. 
Result so far: 31148.03
Deduct 2064 from 2100 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
360 divided by 688 is 0 with a remainder of 360.
Write down 0 as next digit of the result. 
Result so far: 31148.03
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 12:
3600 divided by 688 is 5 with a remainder of 160.
The number 5 becomes the next digit in our result. 
Result so far: 31148.0305
Subtracting 3440 from 3600 leaves us 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.

Let's proceed to step 13:
If we divide 1600 by 688, we get 2 and a remainder of 224.
Write down 2 as next digit of the result. 
Result so far: 31148.03052
If we take 1376 away from 1600, we end up with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 14:
When dividing 2240 by 688, we get 3 with a remainder of 176.
The next digit of our result is 3. 
Result so far: 31148.030523
Subtracting 2064 from 2240 leaves us with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 15:
The number 688 fits into 1760 2 times, leaving a remainder of 384.
The number 2 becomes the next digit in our result. 
Result so far: 31148.0305232
Subtracting 1376 from 1760 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Moving on to step 16:
When dividing 3840 by 688, we get 5 with a remainder of 400.
The next digit of our result is 5. 
Result so far: 31148.03052325
If we subtract 3440 from 3840, 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.

After the division, we end up with 31148.03052325 and a remainder of 4e-07.