We look at the division of 21170636 by 77 
We want to figure out the number of times 21170636 can be divided by 77.

Going ahead to step 1:
When dividing 2 by 77, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 77

Going ahead to step 2:
77 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 77

Going ahead to step 3:
When dividing 211 by 77, we get 2 with a remainder of 57.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 154 from 211 leaves us with 57.
Grab the next digit (7) from the dividend, add it to 57, then carry on: 577 / 77

Moving on to step 4:
If we divide 577 by 77, we get 7 and a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 27.0
The remainder is 38 after subtracting 539 from 577.
Bring next digit (0) of the dividend behind the 38 and repeat the process: 380 / 77

Step 5:
77 can be fit into 380 4 times, resulting in a remainder of 72.
The number 4 becomes the next digit in our result. 
Result so far: 274.0
If we take 308 away from 380, we end up with 72.
Bring next digit (6) of the dividend behind the 72 and repeat the process: 726 / 77

Step 6:
77 can be fit into 726 9 times, resulting in a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 2749.0
Subtract 693 from 726 to get 33.
Fetch the next digit (3) from the dividend, attach it to 33 and continue: 333 / 77

Going ahead to step 7:
If we divide 333 by 77, we get 4 and a remainder of 25.
Put 4 as the next digit of the answer. 
Result so far: 27494.0
The remainder is 25 after subtracting 308 from 333.
Grab the next digit (6) from the dividend, add it to 25, then carry on: 256 / 77

Going ahead to step 8:
77 goes into 256 3 times with a remainder of 25.
The next digit of our result is 3. 
Result so far: 274943.0
If we take 231 away from 256, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 9:
250 divided by 77 is 3 with a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 274943.3
The remainder is 19 after subtracting 231 from 250.
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 10:
If we divide 190 by 77, we get 2 and a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 274943.32
Subtract 154 from 190 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
If we divide 360 by 77, we get 4 and a remainder of 52.
The number 4 becomes the next digit in our result. 
Result so far: 274943.324
Subtract 308 from 360 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 12:
If we divide 520 by 77, we get 6 and a remainder of 58.
Use 6 as the next digit of our solution. 
Result so far: 274943.3246
The remainder is 58 after subtracting 462 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 13:
77 goes into 580 7 times with a remainder of 41.
Put 7 as the next digit of the answer. 
Result so far: 274943.32467
If we take 539 away from 580, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 14:
The number 77 fits into 410 5 times, leaving a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 274943.324675
Deduct 385 from 410 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 15:
The number 77 fits into 250 3 times, leaving a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 274943.3246753
Deduct 231 from 250 and we're left 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.

On to step 16:
The number 77 fits into 190 2 times, leaving a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 274943.32467532
The remainder is 36 after subtracting 154 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 274943.32467532, with a leftover of 3.6e-08.