We look at the division of 66992690 by 421 
We want to figure out the number of times 66992690 can be divided by 421.

Going ahead to step 1:
If we divide 6 by 421, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 421

Moving on to step 2:
66 divided by 421 is 0 with a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 421

On to step 3:
421 can be fit into 669 1 times, resulting in a remainder of 248.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 421 from 669, we get 248.
Take the next digit (9) from the dividend and append it to 248, then repeat: 2489 / 421

Let's proceed to step 4:
When dividing 2489 by 421, we get 5 with a remainder of 384.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we subtract 2105 from 2489, we get 384.
Bring next digit (2) of the dividend behind the 384 and repeat the process: 3842 / 421

Going ahead to step 5:
If we divide 3842 by 421, we get 9 and a remainder of 53.
Put 9 as the next digit of the answer. 
Result so far: 159.0
The remainder is 53 after subtracting 3789 from 3842.
Bring next digit (6) of the dividend behind the 53 and repeat the process: 536 / 421

Let's proceed to step 6:
When dividing 536 by 421, we get 1 with a remainder of 115.
Put 1 as the next digit of the answer. 
Result so far: 1591.0
Subtracting 421 from 536 leaves us with 115.
Include the next digit (9) from the dividend after 115, then repeat: 1159 / 421

Let's proceed to step 7:
When dividing 1159 by 421, we get 2 with a remainder of 317.
The next digit of our result is 2. 
Result so far: 15912.0
Subtract 842 from 1159 to get 317.
Take the next digit (0) from the dividend and append it to 317, then repeat: 3170 / 421

Let's proceed to step 8:
When dividing 3170 by 421, we get 7 with a remainder of 223.
Write down 7 as next digit of the result. 
Result so far: 159127.0
Deduct 2947 from 3170 and we're left with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Going ahead to step 9:
If we divide 2230 by 421, we get 5 and a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 159127.5
The remainder is 125 after subtracting 2105 from 2230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 10:
When dividing 1250 by 421, we get 2 with a remainder of 408.
Put 2 as the next digit of the answer. 
Result so far: 159127.52
If we take 842 away from 1250, we end up with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Moving on to step 11:
If we divide 4080 by 421, we get 9 and a remainder of 291.
Write down 9 as next digit of the result. 
Result so far: 159127.529
Deduct 3789 from 4080 and we're left with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Going ahead to step 12:
If we divide 2910 by 421, we get 6 and a remainder of 384.
Use 6 as the next digit of our solution. 
Result so far: 159127.5296
Subtracting 2526 from 2910 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 13:
3840 divided by 421 is 9 with a remainder of 51.
The next digit of our result is 9. 
Result so far: 159127.52969
If we subtract 3789 from 3840, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 14:
510 divided by 421 is 1 with a remainder of 89.
Write down 1 as next digit of the result. 
Result so far: 159127.529691
If we take 421 away from 510, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 15:
890 divided by 421 is 2 with a remainder of 48.
The next digit of our result is 2. 
Result so far: 159127.5296912
The remainder is 48 after subtracting 842 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 16:
421 goes into 480 1 times with a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 159127.52969121
Subtract 421 from 480 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

The final outcome is 159127.52969121, with a leftover of 5.9e-08.