21416493 ÷ 688 
We want to divide 21416493 by 688.

Going ahead to step 1:
2 divided by 688 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 688

Let's proceed to step 2:
If we divide 21 by 688, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 688

Advancing to step 3:
214 divided by 688 is 0 with a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 214 leaves us with 214.
Take the next digit (1) from the dividend and append it to 214, then repeat: 2141 / 688

Going ahead to step 4:
When dividing 2141 by 688, we get 3 with a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 2064 from 2141 leaves us with 77.
Append the next digit (6) from the dividend to 77 and continue with: 776 / 688

Going ahead to step 5:
688 goes into 776 1 times with a remainder of 88.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
If we subtract 688 from 776, we get 88.
Bring next digit (4) of the dividend behind the 88 and repeat the process: 884 / 688

Let's proceed to step 6:
688 goes into 884 1 times with a remainder of 196.
Use 1 as the next digit of our solution. 
Result so far: 311.0
Subtracting 688 from 884 leaves us with 196.
Append the next digit (9) from the dividend to 196 and continue with: 1969 / 688

Step 7:
688 can be fit into 1969 2 times, resulting in a remainder of 593.
The number 2 becomes the next digit in our result. 
Result so far: 3112.0
The remainder is 593 after subtracting 1376 from 1969.
Grab the next digit (3) from the dividend, add it to 593, then carry on: 5933 / 688

Advancing to step 8:
688 goes into 5933 8 times with a remainder of 429.
The number 8 becomes the next digit in our result. 
Result so far: 31128.0
If we subtract 5504 from 5933, we get 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

Let's proceed to step 9:
When dividing 4290 by 688, we get 6 with a remainder of 162.
Put 6 as the next digit of the answer. 
Result so far: 31128.6
If we take 4128 away from 4290, we end up with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 10:
If we divide 1620 by 688, we get 2 and a remainder of 244.
Record the quotient 2 as the next digit in the result. 
Result so far: 31128.62
If we take 1376 away from 1620, we end up with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

On to step 11:
The number 688 fits into 2440 3 times, leaving a remainder of 376.
Write down 3 as next digit of the result. 
Result so far: 31128.623
Subtracting 2064 from 2440 leaves us with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Going ahead to step 12:
If we divide 3760 by 688, we get 5 and a remainder of 320.
Record the quotient 5 as the next digit in the result. 
Result so far: 31128.6235
If we subtract 3440 from 3760, we 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.

Advancing to step 13:
The number 688 fits into 3200 4 times, leaving a remainder of 448.
Put 4 as the next digit of the answer. 
Result so far: 31128.62354
If we take 2752 away from 3200, we end up with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Going ahead to step 14:
688 can be fit into 4480 6 times, resulting in a remainder of 352.
Use 6 as the next digit of our solution. 
Result so far: 31128.623546
Subtract 4128 from 4480 to get 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Let's proceed to step 15:
3520 divided by 688 is 5 with a remainder of 80.
The number 5 becomes the next digit in our result. 
Result so far: 31128.6235465
Subtracting 3440 from 3520 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 16:
688 goes into 800 1 times with a remainder of 112.
Write down 1 as next digit of the result. 
Result so far: 31128.62354651
Subtract 688 from 800 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The final result is 31128.62354651 with a remainder of 1.12e-07.