Let's divide 21737643 by 80
We want to figure out the number of times 21737643 can be divided by 80.

On to step 1:
When dividing 2 by 80, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 80

Going ahead to step 2:
80 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (7) from the dividend, attach it to 21 and continue: 217 / 80

Advancing to step 3:
217 divided by 80 is 2 with a remainder of 57.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 160 from 217 leaves us with 57.
Fetch the next digit (3) from the dividend, attach it to 57 and continue: 573 / 80

Let's proceed to step 4:
When dividing 573 by 80, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
The remainder is 13 after subtracting 560 from 573.
Include the next digit (7) from the dividend after 13, then repeat: 137 / 80

On to step 5:
If we divide 137 by 80, we get 1 and a remainder of 57.
Write down 1 as next digit of the result. 
Result so far: 271.0
Subtract 80 from 137 to get 57.
Grab the next digit (6) from the dividend, add it to 57, then carry on: 576 / 80

Let's proceed to step 6:
576 divided by 80 is 7 with a remainder of 16.
The next digit of our result is 7. 
Result so far: 2717.0
Deduct 560 from 576 and we're left with 16.
Bring next digit (4) of the dividend behind the 16 and repeat the process: 164 / 80

Moving on to step 7:
80 can be fit into 164 2 times, resulting in a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 27172.0
If we subtract 160 from 164, we get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 80

Advancing to step 8:
If we divide 43 by 80, we get 0 and a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 271720.0
Subtract 0 from 43 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 9:
80 can be fit into 430 5 times, resulting in a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 271720.5
Subtract 400 from 430 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
If we divide 300 by 80, we get 3 and a remainder of 60.
The next digit of our result is 3. 
Result so far: 271720.53
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 11:
If we divide 600 by 80, we get 7 and a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 271720.537
If we subtract 560 from 600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 12:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 271720.5375
If we subtract 400 from 400, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 13:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 271720.5375
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 14:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 271720.5375
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 271720.5375, and the remainder is 0.0.