96921766 ÷ 645 
Let's see how many times 645 fits into 96921766.

Advancing to step 1:
When dividing 9 by 645, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 645

Advancing to step 2:
645 can be fit into 96 0 times, resulting in a remainder of 96.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 96 leaves us with 96.
Bring next digit (9) of the dividend behind the 96 and repeat the process: 969 / 645

Going ahead to step 3:
When dividing 969 by 645, we get 1 with a remainder of 324.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 645 from 969, we get 324.
Bring next digit (2) of the dividend behind the 324 and repeat the process: 3242 / 645

Advancing to step 4:
If we divide 3242 by 645, we get 5 and a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 15.0
The remainder is 17 after subtracting 3225 from 3242.
Bring next digit (1) of the dividend behind the 17 and repeat the process: 171 / 645

Moving on to step 5:
645 goes into 171 0 times with a remainder of 171.
Record the quotient 0 as the next digit in the result. 
Result so far: 150.0
Subtracting 0 from 171 leaves us with 171.
Include the next digit (7) from the dividend after 171, then repeat: 1717 / 645

Let's proceed to step 6:
645 can be fit into 1717 2 times, resulting in a remainder of 427.
The next digit of our result is 2. 
Result so far: 1502.0
Deduct 1290 from 1717 and we're left with 427.
Bring next digit (6) of the dividend behind the 427 and repeat the process: 4276 / 645

Going ahead to step 7:
645 can be fit into 4276 6 times, resulting in a remainder of 406.
Use 6 as the next digit of our solution. 
Result so far: 15026.0
Subtract 3870 from 4276 to get 406.
Bring next digit (6) of the dividend behind the 406 and repeat the process: 4066 / 645

On to step 8:
645 can be fit into 4066 6 times, resulting in a remainder of 196.
The number 6 becomes the next digit in our result. 
Result so far: 150266.0
Subtract 3870 from 4066 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Advancing to step 9:
1960 divided by 645 is 3 with a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 150266.3
Deduct 1935 from 1960 and we're left 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.

Moving on to step 10:
645 can be fit into 250 0 times, resulting in a remainder of 250.
Put 0 as the next digit of the answer. 
Result so far: 150266.3
Subtracting 0 from 250 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 11:
When dividing 2500 by 645, we get 3 with a remainder of 565.
Put 3 as the next digit of the answer. 
Result so far: 150266.303
Subtracting 1935 from 2500 leaves us with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Advancing to step 12:
The number 645 fits into 5650 8 times, leaving a remainder of 490.
Use 8 as the next digit of our solution. 
Result so far: 150266.3038
Deduct 5160 from 5650 and we're left with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

On to step 13:
The number 645 fits into 4900 7 times, leaving a remainder of 385.
Put 7 as the next digit of the answer. 
Result so far: 150266.30387
If we take 4515 away from 4900, we end up with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 14:
If we divide 3850 by 645, we get 5 and a remainder of 625.
The next digit of our result is 5. 
Result so far: 150266.303875
If we take 3225 away from 3850, we end up with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

On to step 15:
6250 divided by 645 is 9 with a remainder of 445.
The next digit of our result is 9. 
Result so far: 150266.3038759
If we take 5805 away from 6250, we end up with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Step 16:
If we divide 4450 by 645, we get 6 and a remainder of 580.
Write down 6 as next digit of the result. 
Result so far: 150266.30387596
Subtracting 3870 from 4450 leaves us with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

The final outcome is 150266.30387596, with a leftover of 5.8e-07.