We're dividing 78543788 by 669 
Let's see how many times 669 fits into 78543788.

Advancing to step 1:
If we divide 7 by 669, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
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

Advancing to step 2:
669 goes into 78 0 times with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Take the next digit (5) from the dividend and append it to 78, then repeat: 785 / 669

Advancing to step 3:
669 goes into 785 1 times with a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 669 from 785 to get 116.
Fetch the next digit (4) from the dividend, attach it to 116 and continue: 1164 / 669

Let's proceed to step 4:
The number 669 fits into 1164 1 times, leaving a remainder of 495.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 669 from 1164 to get 495.
Append the next digit (3) from the dividend to 495 and continue with: 4953 / 669

Moving on to step 5:
When dividing 4953 by 669, we get 7 with a remainder of 270.
Write down 7 as next digit of the result. 
Result so far: 117.0
If we subtract 4683 from 4953, we get 270.
Bring next digit (7) of the dividend behind the 270 and repeat the process: 2707 / 669

Going ahead to step 6:
669 goes into 2707 4 times with a remainder of 31.
Put 4 as the next digit of the answer. 
Result so far: 1174.0
Subtract 2676 from 2707 to get 31.
Fetch the next digit (8) from the dividend, attach it to 31 and continue: 318 / 669

On to step 7:
669 can be fit into 318 0 times, resulting in a remainder of 318.
Put 0 as the next digit of the answer. 
Result so far: 11740.0
If we subtract 0 from 318, we get 318.
Append the next digit (8) from the dividend to 318 and continue with: 3188 / 669

Advancing to step 8:
The number 669 fits into 3188 4 times, leaving a remainder of 512.
Use 4 as the next digit of our solution. 
Result so far: 117404.0
If we take 2676 away from 3188, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Step 9:
When dividing 5120 by 669, we get 7 with a remainder of 437.
The number 7 becomes the next digit in our result. 
Result so far: 117404.7
If we subtract 4683 from 5120, we get 437.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4370, and continue the process.

Advancing to step 10:
4370 divided by 669 is 6 with a remainder of 356.
Use 6 as the next digit of our solution. 
Result so far: 117404.76
Subtracting 4014 from 4370 leaves us with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Moving on to step 11:
When dividing 3560 by 669, we get 5 with a remainder of 215.
The number 5 becomes the next digit in our result. 
Result so far: 117404.765
Subtracting 3345 from 3560 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 12:
669 goes into 2150 3 times with a remainder of 143.
The next digit of our result is 3. 
Result so far: 117404.7653
Deduct 2007 from 2150 and we're left with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Advancing to step 13:
If we divide 1430 by 669, we get 2 and a remainder of 92.
The number 2 becomes the next digit in our result. 
Result so far: 117404.76532
Deduct 1338 from 1430 and we're left with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 14:
669 goes into 920 1 times with a remainder of 251.
Write down 1 as next digit of the result. 
Result so far: 117404.765321
If we subtract 669 from 920, we get 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Moving on to step 15:
If we divide 2510 by 669, we get 3 and a remainder of 503.
The number 3 becomes the next digit in our result. 
Result so far: 117404.7653213
The remainder is 503 after subtracting 2007 from 2510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

Step 16:
The number 669 fits into 5030 7 times, leaving a remainder of 347.
Write down 7 as next digit of the result. 
Result so far: 117404.76532137
The remainder is 347 after subtracting 4683 from 5030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

After the division, we end up with 117404.76532137 and a remainder of 3.47e-07.