56093389 divided by 21 
We want to figure out the number of times 56093389 can be divided by 21.

Step 1:
5 divided by 21 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 21

Let's proceed to step 2:
21 can be fit into 56 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 42 from 56 leaves us with 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 21

Going ahead to step 3:
If we divide 140 by 21, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 26.0
Subtract 126 from 140 to get 14.
Include the next digit (9) from the dividend after 14, then repeat: 149 / 21

On to step 4:
When dividing 149 by 21, we get 7 with a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 267.0
The remainder is 2 after subtracting 147 from 149.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 21

Going ahead to step 5:
21 goes into 23 1 times with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 2671.0
If we take 21 away from 23, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 21

On to step 6:
The number 21 fits into 23 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 26711.0
If we subtract 21 from 23, we get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

Let's proceed to step 7:
When dividing 28 by 21, we get 1 with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 267111.0
Subtracting 21 from 28 leaves us with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 21

Step 8:
21 can be fit into 79 3 times, resulting in a remainder of 16.
Write down 3 as next digit of the result. 
Result so far: 2671113.0
Subtracting 63 from 79 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
When dividing 160 by 21, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 2671113.7
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 10:
When dividing 130 by 21, we get 6 with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 2671113.76
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 2671113.761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 12:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 2671113.7619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 2671113.7619
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
If we divide 100 by 21, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 2671113.761904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 15:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The next digit of our result is 7. 
Result so far: 2671113.7619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 16:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 2671113.76190476
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 2671113.76190476, with a leftover of 4e-09.