We look at the division of 21438660 by 485 
We want to figure out the number of times 21438660 can be divided by 485.

Let's proceed to step 1:
485 goes into 2 0 times 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 / 485

Going ahead to step 2:
When dividing 21 by 485, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 485

Let's proceed to step 3:
When dividing 214 by 485, we get 0 with a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 214, we end up with 214.
Fetch the next digit (3) from the dividend, attach it to 214 and continue: 2143 / 485

Moving on to step 4:
485 goes into 2143 4 times with a remainder of 203.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 1940 from 2143, we get 203.
Take the next digit (8) from the dividend and append it to 203, then repeat: 2038 / 485

Going ahead to step 5:
485 can be fit into 2038 4 times, resulting in a remainder of 98.
Use 4 as the next digit of our solution. 
Result so far: 44.0
If we take 1940 away from 2038, we end up with 98.
Take the next digit (6) from the dividend and append it to 98, then repeat: 986 / 485

On to step 6:
986 divided by 485 is 2 with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 442.0
Subtract 970 from 986 to get 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 485

Advancing to step 7:
485 can be fit into 166 0 times, resulting in a remainder of 166.
The next digit of our result is 0. 
Result so far: 4420.0
If we subtract 0 from 166, we get 166.
Take the next digit (0) from the dividend and append it to 166, then repeat: 1660 / 485

Advancing to step 8:
485 can be fit into 1660 3 times, resulting in a remainder of 205.
The number 3 becomes the next digit in our result. 
Result so far: 44203.0
Subtract 1455 from 1660 to get 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 9:
If we divide 2050 by 485, we get 4 and a remainder of 110.
The next digit of our result is 4. 
Result so far: 44203.4
If we subtract 1940 from 2050, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 10:
485 goes into 1100 2 times with a remainder of 130.
Record the quotient 2 as the next digit in the result. 
Result so far: 44203.42
Subtract 970 from 1100 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 11:
1300 divided by 485 is 2 with a remainder of 330.
Put 2 as the next digit of the answer. 
Result so far: 44203.422
Deduct 970 from 1300 and we're left with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

The quotient of the division is 44203.422, and the remainder is 0.033.