We're dividing 21171588 by 770 
We're looking to find how many times 770 goes into 21171588.

Advancing to step 1:
When dividing 2 by 770, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 770

On to step 2:
The number 770 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 770

Let's proceed to step 3:
If we divide 211 by 770, we get 0 and a remainder of 211.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Grab the next digit (7) from the dividend, add it to 211, then carry on: 2117 / 770

On to step 4:
If we divide 2117 by 770, we get 2 and a remainder of 577.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 577 after subtracting 1540 from 2117.
Bring next digit (1) of the dividend behind the 577 and repeat the process: 5771 / 770

Let's proceed to step 5:
5771 divided by 770 is 7 with a remainder of 381.
Write down 7 as next digit of the result. 
Result so far: 27.0
Subtracting 5390 from 5771 leaves us with 381.
Fetch the next digit (5) from the dividend, attach it to 381 and continue: 3815 / 770

On to step 6:
If we divide 3815 by 770, we get 4 and a remainder of 735.
Put 4 as the next digit of the answer. 
Result so far: 274.0
Subtract 3080 from 3815 to get 735.
Append the next digit (8) from the dividend to 735 and continue with: 7358 / 770

Advancing to step 7:
When dividing 7358 by 770, we get 9 with a remainder of 428.
Put 9 as the next digit of the answer. 
Result so far: 2749.0
If we take 6930 away from 7358, we end up with 428.
Grab the next digit (8) from the dividend, add it to 428, then carry on: 4288 / 770

On to step 8:
4288 divided by 770 is 5 with a remainder of 438.
Write down 5 as next digit of the result. 
Result so far: 27495.0
If we take 3850 away from 4288, we end up with 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

On to step 9:
If we divide 4380 by 770, we get 5 and a remainder of 530.
The next digit of our result is 5. 
Result so far: 27495.5
If we subtract 3850 from 4380, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Step 10:
The number 770 fits into 5300 6 times, leaving a remainder of 680.
The next digit of our result is 6. 
Result so far: 27495.56
Deduct 4620 from 5300 and we're left with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

On to step 11:
If we divide 6800 by 770, we get 8 and a remainder of 640.
Write down 8 as next digit of the result. 
Result so far: 27495.568
Subtracting 6160 from 6800 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Advancing to step 12:
6400 divided by 770 is 8 with a remainder of 240.
Record the quotient 8 as the next digit in the result. 
Result so far: 27495.5688
If we take 6160 away from 6400, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

In conclusion, the division gives 27495.5688 with a balance of 0.0024.