669858 ÷ 43 
We want to figure out the number of times 669858 can be divided by 43.

Going ahead to step 1:
43 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 43

Moving on to step 2:
If we divide 66 by 43, we get 1 and a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 43 from 66 to get 23.
Append the next digit (9) from the dividend to 23 and continue with: 239 / 43

Let's proceed to step 3:
If we divide 239 by 43, we get 5 and a remainder of 24.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we take 215 away from 239, we end up with 24.
Grab the next digit (8) from the dividend, add it to 24, then carry on: 248 / 43

Step 4:
The number 43 fits into 248 5 times, leaving a remainder of 33.
The next digit of our result is 5. 
Result so far: 155.0
Subtract 215 from 248 to get 33.
Bring next digit (5) of the dividend behind the 33 and repeat the process: 335 / 43

On to step 5:
43 goes into 335 7 times with a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 1557.0
If we take 301 away from 335, we end up with 34.
Append the next digit (8) from the dividend to 34 and continue with: 348 / 43

Advancing to step 6:
The number 43 fits into 348 8 times, leaving a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 15578.0
If we subtract 344 from 348, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
43 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 15578.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
43 can be fit into 400 9 times, resulting in a remainder of 13.
The next digit of our result is 9. 
Result so far: 15578.09
If we take 387 away from 400, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 9:
The number 43 fits into 130 3 times, leaving a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 15578.093
Deduct 129 from 130 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 10:
If we divide 10 by 43, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 15578.093
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
100 divided by 43 is 2 with a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 15578.09302
Subtracting 86 from 100 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 12:
The number 43 fits into 140 3 times, leaving a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 15578.093023
If we take 129 away from 140, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 13:
110 divided by 43 is 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 15578.0930232
If we take 86 away from 110, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
If we divide 240 by 43, we get 5 and a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 15578.09302325
If we take 215 away from 240, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final outcome is 15578.09302325, with a leftover of 2.5e-08.