77754311 ÷ 421 
We're looking to find how many times 421 goes into 77754311.

Going ahead to step 1:
If we divide 7 by 421, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 421

Step 2:
77 divided by 421 is 0 with a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Fetch the next digit (7) from the dividend, attach it to 77 and continue: 777 / 421

Let's proceed to step 3:
421 can be fit into 777 1 times, resulting in a remainder of 356.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 421 from 777 to get 356.
Append the next digit (5) from the dividend to 356 and continue with: 3565 / 421

Let's proceed to step 4:
When dividing 3565 by 421, we get 8 with a remainder of 197.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we take 3368 away from 3565, we end up with 197.
Append the next digit (4) from the dividend to 197 and continue with: 1974 / 421

On to step 5:
421 can be fit into 1974 4 times, resulting in a remainder of 290.
Use 4 as the next digit of our solution. 
Result so far: 184.0
If we subtract 1684 from 1974, we get 290.
Bring next digit (3) of the dividend behind the 290 and repeat the process: 2903 / 421

Going ahead to step 6:
The number 421 fits into 2903 6 times, leaving a remainder of 377.
Write down 6 as next digit of the result. 
Result so far: 1846.0
Subtract 2526 from 2903 to get 377.
Bring next digit (1) of the dividend behind the 377 and repeat the process: 3771 / 421

Let's proceed to step 7:
421 goes into 3771 8 times with a remainder of 403.
Put 8 as the next digit of the answer. 
Result so far: 18468.0
Subtracting 3368 from 3771 leaves us with 403.
Grab the next digit (1) from the dividend, add it to 403, then carry on: 4031 / 421

Let's proceed to step 8:
If we divide 4031 by 421, we get 9 and a remainder of 242.
Use 9 as the next digit of our solution. 
Result so far: 184689.0
If we take 3789 away from 4031, we end up with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Let's proceed to step 9:
2420 divided by 421 is 5 with a remainder of 315.
The number 5 becomes the next digit in our result. 
Result so far: 184689.5
Subtract 2105 from 2420 to get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Going ahead to step 10:
If we divide 3150 by 421, we get 7 and a remainder of 203.
Write down 7 as next digit of the result. 
Result so far: 184689.57
Subtract 2947 from 3150 to get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 11:
421 can be fit into 2030 4 times, resulting in a remainder of 346.
Use 4 as the next digit of our solution. 
Result so far: 184689.574
If we take 1684 away from 2030, we end up with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Let's proceed to step 12:
If we divide 3460 by 421, we get 8 and a remainder of 92.
The next digit of our result is 8. 
Result so far: 184689.5748
Deduct 3368 from 3460 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 13:
421 goes into 920 2 times with a remainder of 78.
The next digit of our result is 2. 
Result so far: 184689.57482
Subtract 842 from 920 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 14:
If we divide 780 by 421, we get 1 and a remainder of 359.
The next digit of our result is 1. 
Result so far: 184689.574821
Subtracting 421 from 780 leaves us with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Step 15:
When dividing 3590 by 421, we get 8 with a remainder of 222.
Use 8 as the next digit of our solution. 
Result so far: 184689.5748218
Subtract 3368 from 3590 to get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Advancing to step 16:
If we divide 2220 by 421, we get 5 and a remainder of 115.
Use 5 as the next digit of our solution. 
Result so far: 184689.57482185
Subtract 2105 from 2220 to get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

The final result is 184689.57482185 with a remainder of 1.15e-07.