We're dividing 97912212 by 643 
We want to figure out the number of times 97912212 can be divided by 643.

Moving on to step 1:
9 divided by 643 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 643

Let's proceed to step 2:
If we divide 97 by 643, we get 0 and a remainder of 97.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 97, we get 97.
Append the next digit (9) from the dividend to 97 and continue with: 979 / 643

Step 3:
979 divided by 643 is 1 with a remainder of 336.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 643 from 979 and we're left with 336.
Grab the next digit (1) from the dividend, add it to 336, then carry on: 3361 / 643

Let's proceed to step 4:
643 can be fit into 3361 5 times, resulting in a remainder of 146.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 3215 from 3361 leaves us with 146.
Bring next digit (2) of the dividend behind the 146 and repeat the process: 1462 / 643

Going ahead to step 5:
The number 643 fits into 1462 2 times, leaving a remainder of 176.
Use 2 as the next digit of our solution. 
Result so far: 152.0
The remainder is 176 after subtracting 1286 from 1462.
Include the next digit (2) from the dividend after 176, then repeat: 1762 / 643

Moving on to step 6:
1762 divided by 643 is 2 with a remainder of 476.
Put 2 as the next digit of the answer. 
Result so far: 1522.0
If we take 1286 away from 1762, we end up with 476.
Grab the next digit (1) from the dividend, add it to 476, then carry on: 4761 / 643

Going ahead to step 7:
The number 643 fits into 4761 7 times, leaving a remainder of 260.
Record the quotient 7 as the next digit in the result. 
Result so far: 15227.0
The remainder is 260 after subtracting 4501 from 4761.
Bring next digit (2) of the dividend behind the 260 and repeat the process: 2602 / 643

On to step 8:
643 goes into 2602 4 times with a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 152274.0
If we subtract 2572 from 2602, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
643 can be fit into 300 0 times, resulting in a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 152274.0
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 10:
When dividing 3000 by 643, we get 4 with a remainder of 428.
Put 4 as the next digit of the answer. 
Result so far: 152274.04
Deduct 2572 from 3000 and we're left with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

On to step 11:
643 can be fit into 4280 6 times, resulting in a remainder of 422.
Put 6 as the next digit of the answer. 
Result so far: 152274.046
Subtract 3858 from 4280 to get 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Step 12:
If we divide 4220 by 643, we get 6 and a remainder of 362.
Use 6 as the next digit of our solution. 
Result so far: 152274.0466
If we subtract 3858 from 4220, we get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

After the division, we end up with 152274.0466 and a remainder of 0.00362.