43972965 ÷ 686 
We want to figure out the number of times 43972965 can be divided by 686.

Moving on to step 1:
When dividing 4 by 686, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 686

Going ahead to step 2:
When dividing 43 by 686, we get 0 with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Include the next digit (9) from the dividend after 43, then repeat: 439 / 686

Going ahead to step 3:
The number 686 fits into 439 0 times, leaving a remainder of 439.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 439, we end up with 439.
Grab the next digit (7) from the dividend, add it to 439, then carry on: 4397 / 686

Let's proceed to step 4:
The number 686 fits into 4397 6 times, leaving a remainder of 281.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 4116 from 4397 and we're left with 281.
Include the next digit (2) from the dividend after 281, then repeat: 2812 / 686

Moving on to step 5:
The number 686 fits into 2812 4 times, leaving a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 64.0
The remainder is 68 after subtracting 2744 from 2812.
Take the next digit (9) from the dividend and append it to 68, then repeat: 689 / 686

Step 6:
When dividing 689 by 686, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 641.0
If we subtract 686 from 689, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 686

Going ahead to step 7:
If we divide 36 by 686, we get 0 and a remainder of 36.
Put 0 as the next digit of the answer. 
Result so far: 6410.0
If we subtract 0 from 36, we get 36.
Include the next digit (5) from the dividend after 36, then repeat: 365 / 686

Going ahead to step 8:
If we divide 365 by 686, we get 0 and a remainder of 365.
Record the quotient 0 as the next digit in the result. 
Result so far: 64100.0
Subtract 0 from 365 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Moving on to step 9:
686 can be fit into 3650 5 times, resulting in a remainder of 220.
Use 5 as the next digit of our solution. 
Result so far: 64100.5
If we take 3430 away from 3650, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 10:
The number 686 fits into 2200 3 times, leaving a remainder of 142.
Put 3 as the next digit of the answer. 
Result so far: 64100.53
The remainder is 142 after subtracting 2058 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Moving on to step 11:
When dividing 1420 by 686, we get 2 with a remainder of 48.
The next digit of our result is 2. 
Result so far: 64100.532
Subtracting 1372 from 1420 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 12:
480 divided by 686 is 0 with a remainder of 480.
Use 0 as the next digit of our solution. 
Result so far: 64100.532
Subtract 0 from 480 to 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.

Let's proceed to step 13:
The number 686 fits into 4800 6 times, leaving a remainder of 684.
Put 6 as the next digit of the answer. 
Result so far: 64100.53206
Subtracting 4116 from 4800 leaves us with 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Step 14:
686 can be fit into 6840 9 times, resulting in a remainder of 666.
Write down 9 as next digit of the result. 
Result so far: 64100.532069
Deduct 6174 from 6840 and we're left with 666.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6660, and continue the process.

Step 15:
When dividing 6660 by 686, we get 9 with a remainder of 486.
Put 9 as the next digit of the answer. 
Result so far: 64100.5320699
If we take 6174 away from 6660, we end up with 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

After the division, we end up with 64100.5320699 and a remainder of 4.86e-06.