We look at the division of 37580797 by 21 
Our goal is to divide 37580797 by 21.

Going ahead to step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 21

On to step 2:
The number 21 fits into 37 1 times, leaving a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 21 from 37 leaves us with 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 21

Advancing to step 3:
165 divided by 21 is 7 with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
The remainder is 18 after subtracting 147 from 165.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 21

Step 4:
188 divided by 21 is 8 with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 178.0
If we subtract 168 from 188, we get 20.
Append the next digit (0) from the dividend to 20 and continue with: 200 / 21

Moving on to step 5:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 1789.0
Subtracting 189 from 200 leaves us with 11.
Bring next digit (7) of the dividend behind the 11 and repeat the process: 117 / 21

On to step 6:
21 can be fit into 117 5 times, resulting in a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 17895.0
Subtracting 105 from 117 leaves us with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 21

On to step 7:
129 divided by 21 is 6 with a remainder of 3.
The next digit of our result is 6. 
Result so far: 178956.0
If we subtract 126 from 129, we get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 21

Going ahead to step 8:
21 goes into 37 1 times with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 1789561.0
If we subtract 21 from 37, 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.

Moving on to step 9:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 1789561.7
Deduct 147 from 160 and we're left 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.

Let's proceed to step 10:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 1789561.76
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.

Moving on to step 11:
40 divided by 21 is 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1789561.761
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 12:
If we divide 190 by 21, we get 9 and a remainder of 1.
The next digit of our result is 9. 
Result so far: 1789561.7619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 13:
When dividing 10 by 21, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 1789561.7619
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:
100 divided by 21 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 1789561.761904
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.

Let's proceed to step 15:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 1789561.7619047
Subtract 147 from 160 to 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.

Moving on to step 16:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 1789561.76190476
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 result is 1789561.76190476 with a remainder of 4e-09.