77789340 ÷ 921 
We're looking to find how many times 921 goes into 77789340.

Moving on to step 1:
7 divided by 921 is 0 with 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.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 921

Step 2:
921 goes into 77 0 times with a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Take the next digit (7) from the dividend and append it to 77, then repeat: 777 / 921

On to step 3:
921 goes into 777 0 times with a remainder of 777.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 777, we get 777.
Bring next digit (8) of the dividend behind the 777 and repeat the process: 7778 / 921

Advancing to step 4:
921 goes into 7778 8 times with a remainder of 410.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 410 after subtracting 7368 from 7778.
Take the next digit (9) from the dividend and append it to 410, then repeat: 4109 / 921

Step 5:
The number 921 fits into 4109 4 times, leaving a remainder of 425.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
If we take 3684 away from 4109, we end up with 425.
Bring next digit (3) of the dividend behind the 425 and repeat the process: 4253 / 921

Step 6:
If we divide 4253 by 921, we get 4 and a remainder of 569.
Record the quotient 4 as the next digit in the result. 
Result so far: 844.0
If we subtract 3684 from 4253, we get 569.
Append the next digit (4) from the dividend to 569 and continue with: 5694 / 921

Let's proceed to step 7:
5694 divided by 921 is 6 with a remainder of 168.
Use 6 as the next digit of our solution. 
Result so far: 8446.0
Subtract 5526 from 5694 to get 168.
Grab the next digit (0) from the dividend, add it to 168, then carry on: 1680 / 921

Moving on to step 8:
1680 divided by 921 is 1 with a remainder of 759.
Write down 1 as next digit of the result. 
Result so far: 84461.0
The remainder is 759 after subtracting 921 from 1680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7590, and continue the process.

Advancing to step 9:
7590 divided by 921 is 8 with a remainder of 222.
Put 8 as the next digit of the answer. 
Result so far: 84461.8
Deduct 7368 from 7590 and we're left with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Step 10:
921 can be fit into 2220 2 times, resulting in a remainder of 378.
Put 2 as the next digit of the answer. 
Result so far: 84461.82
If we take 1842 away from 2220, we end up with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Going ahead to step 11:
3780 divided by 921 is 4 with a remainder of 96.
The number 4 becomes the next digit in our result. 
Result so far: 84461.824
The remainder is 96 after subtracting 3684 from 3780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 12:
If we divide 960 by 921, we get 1 and a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 84461.8241
Deduct 921 from 960 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 13:
390 divided by 921 is 0 with a remainder of 390.
Use 0 as the next digit of our solution. 
Result so far: 84461.8241
If we take 0 away from 390, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Moving on to step 14:
921 can be fit into 3900 4 times, resulting in a remainder of 216.
The next digit of our result is 4. 
Result so far: 84461.824104
Subtracting 3684 from 3900 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

On to step 15:
921 can be fit into 2160 2 times, resulting in a remainder of 318.
Record the quotient 2 as the next digit in the result. 
Result so far: 84461.8241042
Subtract 1842 from 2160 to get 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Advancing to step 16:
The number 921 fits into 3180 3 times, leaving a remainder of 417.
The next digit of our result is 3. 
Result so far: 84461.82410423
Subtracting 2763 from 3180 leaves us with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

The final outcome is 84461.82410423, with a leftover of 4.17e-07.