21507908 divided by 160 
We want to figure out the number of times 21507908 can be divided by 160.

Step 1:
160 goes into 2 0 times 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 / 160

Advancing to step 2:
If we divide 21 by 160, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 160

Let's proceed to step 3:
160 can be fit into 215 1 times, resulting in a remainder of 55.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 55 after subtracting 160 from 215.
Include the next digit (0) from the dividend after 55, then repeat: 550 / 160

Let's proceed to step 4:
550 divided by 160 is 3 with a remainder of 70.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 480 from 550 and we're left with 70.
Bring next digit (7) of the dividend behind the 70 and repeat the process: 707 / 160

Let's proceed to step 5:
When dividing 707 by 160, we get 4 with a remainder of 67.
Use 4 as the next digit of our solution. 
Result so far: 134.0
Subtract 640 from 707 to get 67.
Take the next digit (9) from the dividend and append it to 67, then repeat: 679 / 160

Step 6:
If we divide 679 by 160, we get 4 and a remainder of 39.
Record the quotient 4 as the next digit in the result. 
Result so far: 1344.0
Subtracting 640 from 679 leaves us with 39.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 160

Going ahead to step 7:
390 divided by 160 is 2 with a remainder of 70.
Put 2 as the next digit of the answer. 
Result so far: 13442.0
If we subtract 320 from 390, we get 70.
Grab the next digit (8) from the dividend, add it to 70, then carry on: 708 / 160

Moving on to step 8:
160 can be fit into 708 4 times, resulting in a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 134424.0
The remainder is 68 after subtracting 640 from 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 9:
680 divided by 160 is 4 with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 134424.4
The remainder is 40 after subtracting 640 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
The number 160 fits into 400 2 times, leaving a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 134424.42
Subtract 320 from 400 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
If we divide 800 by 160, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 134424.425
Subtract 800 from 800 to 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 12:
160 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 134424.425
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.

Moving on to step 13:
The number 160 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 134424.425
Subtract 0 from 0 to 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.

Our division results in 134424.425 with a remaining 0.0.