We divide 78721458 by 669
We want to figure out the number of times 78721458 can be divided by 669.

Let's proceed to step 1:
669 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 669

Moving on to step 2:
When dividing 78 by 669, we get 0 with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Include the next digit (7) from the dividend after 78, then repeat: 787 / 669

On to step 3:
669 can be fit into 787 1 times, resulting in a remainder of 118.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 669 away from 787, we end up with 118.
Append the next digit (2) from the dividend to 118 and continue with: 1182 / 669

Moving on to step 4:
If we divide 1182 by 669, we get 1 and a remainder of 513.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 513 after subtracting 669 from 1182.
Fetch the next digit (1) from the dividend, attach it to 513 and continue: 5131 / 669

Step 5:
When dividing 5131 by 669, we get 7 with a remainder of 448.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
Subtracting 4683 from 5131 leaves us with 448.
Append the next digit (4) from the dividend to 448 and continue with: 4484 / 669

Moving on to step 6:
669 goes into 4484 6 times with a remainder of 470.
The next digit of our result is 6. 
Result so far: 1176.0
If we subtract 4014 from 4484, we get 470.
Grab the next digit (5) from the dividend, add it to 470, then carry on: 4705 / 669

On to step 7:
If we divide 4705 by 669, we get 7 and a remainder of 22.
The next digit of our result is 7. 
Result so far: 11767.0
Subtracting 4683 from 4705 leaves us with 22.
Bring next digit (8) of the dividend behind the 22 and repeat the process: 228 / 669

Going ahead to step 8:
669 can be fit into 228 0 times, resulting in a remainder of 228.
Put 0 as the next digit of the answer. 
Result so far: 117670.0
Deduct 0 from 228 and we're left with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 9:
When dividing 2280 by 669, we get 3 with a remainder of 273.
The number 3 becomes the next digit in our result. 
Result so far: 117670.3
Subtracting 2007 from 2280 leaves us with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Advancing to step 10:
2730 divided by 669 is 4 with a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 117670.34
The remainder is 54 after subtracting 2676 from 2730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 11:
The number 669 fits into 540 0 times, leaving a remainder of 540.
Record the quotient 0 as the next digit in the result. 
Result so far: 117670.34
The remainder is 540 after subtracting 0 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Going ahead to step 12:
5400 divided by 669 is 8 with a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 117670.3408
If we subtract 5352 from 5400, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 13:
480 divided by 669 is 0 with a remainder of 480.
The next digit of our result is 0. 
Result so far: 117670.3408
If we subtract 0 from 480, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 14:
669 can be fit into 4800 7 times, resulting in a remainder of 117.
Put 7 as the next digit of the answer. 
Result so far: 117670.340807
Deduct 4683 from 4800 and we're left with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Advancing to step 15:
1170 divided by 669 is 1 with a remainder of 501.
Record the quotient 1 as the next digit in the result. 
Result so far: 117670.3408071
Subtract 669 from 1170 to get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Advancing to step 16:
5010 divided by 669 is 7 with a remainder of 327.
Use 7 as the next digit of our solution. 
Result so far: 117670.34080717
Subtracting 4683 from 5010 leaves us with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

After the division, we end up with 117670.34080717 and a remainder of 3.27e-07.