21338890 ÷ 870 
Let's see how many times 870 fits into 21338890.

Going ahead to step 1:
2 divided by 870 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 870

Moving on to step 2:
870 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 870

Going ahead to step 3:
213 divided by 870 is 0 with a remainder of 213.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 213 to get 213.
Fetch the next digit (3) from the dividend, attach it to 213 and continue: 2133 / 870

Moving on to step 4:
870 can be fit into 2133 2 times, resulting in a remainder of 393.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1740 from 2133 to get 393.
Bring next digit (8) of the dividend behind the 393 and repeat the process: 3938 / 870

Going ahead to step 5:
The number 870 fits into 3938 4 times, leaving a remainder of 458.
Put 4 as the next digit of the answer. 
Result so far: 24.0
If we take 3480 away from 3938, we end up with 458.
Include the next digit (8) from the dividend after 458, then repeat: 4588 / 870

Advancing to step 6:
870 goes into 4588 5 times with a remainder of 238.
Use 5 as the next digit of our solution. 
Result so far: 245.0
Subtracting 4350 from 4588 leaves us with 238.
Append the next digit (9) from the dividend to 238 and continue with: 2389 / 870

Going ahead to step 7:
870 goes into 2389 2 times with a remainder of 649.
Record the quotient 2 as the next digit in the result. 
Result so far: 2452.0
If we subtract 1740 from 2389, we get 649.
Append the next digit (0) from the dividend to 649 and continue with: 6490 / 870

Going ahead to step 8:
6490 divided by 870 is 7 with a remainder of 400.
Record the quotient 7 as the next digit in the result. 
Result so far: 24527.0
If we take 6090 away from 6490, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 9:
When dividing 4000 by 870, we get 4 with a remainder of 520.
The number 4 becomes the next digit in our result. 
Result so far: 24527.4
Subtracting 3480 from 4000 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Let's proceed to step 10:
When dividing 5200 by 870, we get 5 with a remainder of 850.
Record the quotient 5 as the next digit in the result. 
Result so far: 24527.45
Subtracting 4350 from 5200 leaves us with 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8500, and continue the process.

Moving on to step 11:
The number 870 fits into 8500 9 times, leaving a remainder of 670.
Record the quotient 9 as the next digit in the result. 
Result so far: 24527.459
If we take 7830 away from 8500, we end up with 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

Step 12:
870 goes into 6700 7 times with a remainder of 610.
Put 7 as the next digit of the answer. 
Result so far: 24527.4597
Subtracting 6090 from 6700 leaves us with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Step 13:
870 can be fit into 6100 7 times, resulting in a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 24527.45977
Subtract 6090 from 6100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 24527.45977, and the remainder is 1e-05.