19721 ÷ 53 
We want to figure out the number of times 19721 can be divided by 53.

On to step 1:
53 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 53

On to step 2:
When dividing 19 by 53, we get 0 with a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 19 leaves us with 19.
Include the next digit (7) from the dividend after 19, then repeat: 197 / 53

Moving on to step 3:
If we divide 197 by 53, we get 3 and a remainder of 38.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 159 from 197 to get 38.
Append the next digit (2) from the dividend to 38 and continue with: 382 / 53

Going ahead to step 4:
53 goes into 382 7 times with a remainder of 11.
The next digit of our result is 7. 
Result so far: 37.0
Deduct 371 from 382 and we're left with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 53

Let's proceed to step 5:
53 can be fit into 111 2 times, resulting in a remainder of 5.
The next digit of our result is 2. 
Result so far: 372.0
If we take 106 away from 111, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 6:
If we divide 50 by 53, we get 0 and a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 372.0
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
If we divide 500 by 53, we get 9 and a remainder of 23.
Put 9 as the next digit of the answer. 
Result so far: 372.09
The remainder is 23 after subtracting 477 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 8:
53 can be fit into 230 4 times, resulting in a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 372.094
If we take 212 away from 230, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 9:
When dividing 180 by 53, we get 3 with a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 372.0943
If we take 159 away from 180, we end up 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 10:
53 goes into 210 3 times with a remainder of 51.
Record the quotient 3 as the next digit in the result. 
Result so far: 372.09433
Subtracting 159 from 210 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The quotient of the division is 372.09433, and the remainder is 5.1e-05.