We're dividing 66120990 by 458 
We want to figure out the number of times 66120990 can be divided by 458.

On to step 1:
458 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 458

Moving on to step 2:
When dividing 66 by 458, we get 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 458

Let's proceed to step 3:
The number 458 fits into 661 1 times, leaving a remainder of 203.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 458 from 661 and we're left with 203.
Bring next digit (2) of the dividend behind the 203 and repeat the process: 2032 / 458

Advancing to step 4:
458 goes into 2032 4 times with a remainder of 200.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtracting 1832 from 2032 leaves us with 200.
Grab the next digit (0) from the dividend, add it to 200, then carry on: 2000 / 458

Moving on to step 5:
The number 458 fits into 2000 4 times, leaving a remainder of 168.
The next digit of our result is 4. 
Result so far: 144.0
If we take 1832 away from 2000, we end up with 168.
Fetch the next digit (9) from the dividend, attach it to 168 and continue: 1689 / 458

Going ahead to step 6:
When dividing 1689 by 458, we get 3 with a remainder of 315.
Write down 3 as next digit of the result. 
Result so far: 1443.0
Subtract 1374 from 1689 to get 315.
Take the next digit (9) from the dividend and append it to 315, then repeat: 3159 / 458

Advancing to step 7:
458 goes into 3159 6 times with a remainder of 411.
Record the quotient 6 as the next digit in the result. 
Result so far: 14436.0
Subtracting 2748 from 3159 leaves us with 411.
Fetch the next digit (0) from the dividend, attach it to 411 and continue: 4110 / 458

Moving on to step 8:
458 goes into 4110 8 times with a remainder of 446.
Put 8 as the next digit of the answer. 
Result so far: 144368.0
Deduct 3664 from 4110 and we're left with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

On to step 9:
If we divide 4460 by 458, we get 9 and a remainder of 338.
The number 9 becomes the next digit in our result. 
Result so far: 144368.9
Subtracting 4122 from 4460 leaves us with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Going ahead to step 10:
458 goes into 3380 7 times with a remainder of 174.
The next digit of our result is 7. 
Result so far: 144368.97
Subtract 3206 from 3380 to get 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

On to step 11:
If we divide 1740 by 458, we get 3 and a remainder of 366.
Put 3 as the next digit of the answer. 
Result so far: 144368.973
Subtracting 1374 from 1740 leaves us with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Step 12:
If we divide 3660 by 458, we get 7 and a remainder of 454.
The number 7 becomes the next digit in our result. 
Result so far: 144368.9737
Deduct 3206 from 3660 and we're left with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Let's proceed to step 13:
458 can be fit into 4540 9 times, resulting in a remainder of 418.
The number 9 becomes the next digit in our result. 
Result so far: 144368.97379
Subtract 4122 from 4540 to get 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

On to step 14:
When dividing 4180 by 458, we get 9 with a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 144368.973799
If we take 4122 away from 4180, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

After the division, we end up with 144368.973799 and a remainder of 5.8e-06.