Let's divide 288445 by 21
We're looking to find how many times 21 goes into 288445.

Advancing to step 1:
21 can be fit into 2 0 times, resulting in 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.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 21

Going ahead to step 2:
If we divide 28 by 21, we get 1 and a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 21 from 28, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 21

Step 3:
If we divide 78 by 21, we get 3 and a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 63 from 78 and we're left with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 21

Advancing to step 4:
When dividing 154 by 21, we get 7 with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 137.0
If we take 147 away from 154, we end up with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 21

Going ahead to step 5:
When dividing 74 by 21, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 1373.0
Subtract 63 from 74 to get 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 21

Going ahead to step 6:
If we divide 115 by 21, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 13735.0
Subtract 105 from 115 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.

Advancing to step 7:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 13735.4
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 13735.47
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 9:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 13735.476
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 13735.4761
Subtract 21 from 40 to get 19.
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 11:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 13735.47619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 12:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 13735.47619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 13:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 13735.4761904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 14:
When dividing 160 by 21, we get 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 13735.47619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

In conclusion, the division gives 13735.47619047 with a balance of 1.3e-08.