21421151 ÷ 497 
We want to figure out the number of times 21421151 can be divided by 497.

Let's proceed to step 1:
When dividing 2 by 497, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 497

Moving on to step 2:
497 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 497

Moving on to step 3:
497 can be fit into 214 0 times, resulting in a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 214 to get 214.
Append the next digit (2) from the dividend to 214 and continue with: 2142 / 497

Step 4:
497 can be fit into 2142 4 times, resulting in a remainder of 154.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 1988 from 2142 and we're left with 154.
Take the next digit (1) from the dividend and append it to 154, then repeat: 1541 / 497

Advancing to step 5:
If we divide 1541 by 497, we get 3 and a remainder of 50.
Use 3 as the next digit of our solution. 
Result so far: 43.0
Deduct 1491 from 1541 and we're left with 50.
Take the next digit (1) from the dividend and append it to 50, then repeat: 501 / 497

Moving on to step 6:
497 goes into 501 1 times with a remainder of 4.
The next digit of our result is 1. 
Result so far: 431.0
Subtract 497 from 501 to get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 497

Let's proceed to step 7:
If we divide 45 by 497, we get 0 and a remainder of 45.
The next digit of our result is 0. 
Result so far: 4310.0
The remainder is 45 after subtracting 0 from 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 497

On to step 8:
If we divide 451 by 497, we get 0 and a remainder of 451.
The next digit of our result is 0. 
Result so far: 43100.0
The remainder is 451 after subtracting 0 from 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Moving on to step 9:
4510 divided by 497 is 9 with a remainder of 37.
The next digit of our result is 9. 
Result so far: 43100.9
If we subtract 4473 from 4510, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 10:
If we divide 370 by 497, we get 0 and a remainder of 370.
Write down 0 as next digit of the result. 
Result so far: 43100.9
If we take 0 away from 370, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 11:
If we divide 3700 by 497, we get 7 and a remainder of 221.
Record the quotient 7 as the next digit in the result. 
Result so far: 43100.907
Subtract 3479 from 3700 to get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Moving on to step 12:
497 can be fit into 2210 4 times, resulting in a remainder of 222.
The next digit of our result is 4. 
Result so far: 43100.9074
The remainder is 222 after subtracting 1988 from 2210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Let's proceed to step 13:
The number 497 fits into 2220 4 times, leaving a remainder of 232.
Use 4 as the next digit of our solution. 
Result so far: 43100.90744
If we take 1988 away from 2220, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

After the division, we end up with 43100.90744 and a remainder of 0.000232.