21935880 ÷ 637 
We're looking to find how many times 637 goes into 21935880.

Step 1:
637 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 637

Step 2:
If we divide 21 by 637, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (9) of the dividend behind the 21 and repeat the process: 219 / 637

Let's proceed to step 3:
The number 637 fits into 219 0 times, leaving a remainder of 219.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 219 and we're left with 219.
Include the next digit (3) from the dividend after 219, then repeat: 2193 / 637

Let's proceed to step 4:
2193 divided by 637 is 3 with a remainder of 282.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1911 from 2193, we get 282.
Take the next digit (5) from the dividend and append it to 282, then repeat: 2825 / 637

On to step 5:
If we divide 2825 by 637, we get 4 and a remainder of 277.
Write down 4 as next digit of the result. 
Result so far: 34.0
Subtracting 2548 from 2825 leaves us with 277.
Include the next digit (8) from the dividend after 277, then repeat: 2778 / 637

Moving on to step 6:
When dividing 2778 by 637, we get 4 with a remainder of 230.
Write down 4 as next digit of the result. 
Result so far: 344.0
Subtract 2548 from 2778 to get 230.
Take the next digit (8) from the dividend and append it to 230, then repeat: 2308 / 637

On to step 7:
637 can be fit into 2308 3 times, resulting in a remainder of 397.
Use 3 as the next digit of our solution. 
Result so far: 3443.0
If we subtract 1911 from 2308, we get 397.
Bring next digit (0) of the dividend behind the 397 and repeat the process: 3970 / 637

Moving on to step 8:
If we divide 3970 by 637, we get 6 and a remainder of 148.
Put 6 as the next digit of the answer. 
Result so far: 34436.0
Subtracting 3822 from 3970 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Going ahead to step 9:
The number 637 fits into 1480 2 times, leaving a remainder of 206.
Write down 2 as next digit of the result. 
Result so far: 34436.2
Subtracting 1274 from 1480 leaves us with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

On to step 10:
2060 divided by 637 is 3 with a remainder of 149.
Record the quotient 3 as the next digit in the result. 
Result so far: 34436.23
Subtract 1911 from 2060 to get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 11:
The number 637 fits into 1490 2 times, leaving a remainder of 216.
Put 2 as the next digit of the answer. 
Result so far: 34436.232
Subtract 1274 from 1490 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 12:
2160 divided by 637 is 3 with a remainder of 249.
Put 3 as the next digit of the answer. 
Result so far: 34436.2323
If we subtract 1911 from 2160, we get 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

On to step 13:
The number 637 fits into 2490 3 times, leaving a remainder of 579.
The number 3 becomes the next digit in our result. 
Result so far: 34436.23233
Subtract 1911 from 2490 to get 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

The final outcome is 34436.23233, with a leftover of 0.000579.