We're dividing 43780488 by 421 
We want to divide 43780488 by 421.

On to step 1:
4 divided by 421 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 421

Advancing to step 2:
421 can be fit into 43 0 times, resulting in a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Include the next digit (7) from the dividend after 43, then repeat: 437 / 421

On to step 3:
The number 421 fits into 437 1 times, leaving a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 421 from 437, we get 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 421

Step 4:
168 divided by 421 is 0 with a remainder of 168.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 168, we end up with 168.
Take the next digit (0) from the dividend and append it to 168, then repeat: 1680 / 421

Step 5:
421 goes into 1680 3 times with a remainder of 417.
Put 3 as the next digit of the answer. 
Result so far: 103.0
If we take 1263 away from 1680, we end up with 417.
Include the next digit (4) from the dividend after 417, then repeat: 4174 / 421

Advancing to step 6:
421 goes into 4174 9 times with a remainder of 385.
Write down 9 as next digit of the result. 
Result so far: 1039.0
Subtract 3789 from 4174 to get 385.
Grab the next digit (8) from the dividend, add it to 385, then carry on: 3858 / 421

Moving on to step 7:
When dividing 3858 by 421, we get 9 with a remainder of 69.
The next digit of our result is 9. 
Result so far: 10399.0
If we subtract 3789 from 3858, we get 69.
Bring next digit (8) of the dividend behind the 69 and repeat the process: 698 / 421

Advancing to step 8:
421 can be fit into 698 1 times, resulting in a remainder of 277.
Write down 1 as next digit of the result. 
Result so far: 103991.0
Deduct 421 from 698 and we're left with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Advancing to step 9:
When dividing 2770 by 421, we get 6 with a remainder of 244.
Use 6 as the next digit of our solution. 
Result so far: 103991.6
The remainder is 244 after subtracting 2526 from 2770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Let's proceed to step 10:
When dividing 2440 by 421, we get 5 with a remainder of 335.
The number 5 becomes the next digit in our result. 
Result so far: 103991.65
Deduct 2105 from 2440 and we're left with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Step 11:
When dividing 3350 by 421, we get 7 with a remainder of 403.
Put 7 as the next digit of the answer. 
Result so far: 103991.657
If we subtract 2947 from 3350, we get 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Moving on to step 12:
4030 divided by 421 is 9 with a remainder of 241.
Put 9 as the next digit of the answer. 
Result so far: 103991.6579
The remainder is 241 after subtracting 3789 from 4030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

On to step 13:
When dividing 2410 by 421, we get 5 with a remainder of 305.
Use 5 as the next digit of our solution. 
Result so far: 103991.65795
If we subtract 2105 from 2410, we get 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Going ahead to step 14:
If we divide 3050 by 421, we get 7 and a remainder of 103.
Write down 7 as next digit of the result. 
Result so far: 103991.657957
Deduct 2947 from 3050 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Step 15:
The number 421 fits into 1030 2 times, leaving a remainder of 188.
The next digit of our result is 2. 
Result so far: 103991.6579572
Subtracting 842 from 1030 leaves us with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 16:
The number 421 fits into 1880 4 times, leaving a remainder of 196.
Write down 4 as next digit of the result. 
Result so far: 103991.65795724
The remainder is 196 after subtracting 1684 from 1880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

The final result is 103991.65795724 with a remainder of 1.96e-07.