97461599 ÷ 643 
We want to figure out the number of times 97461599 can be divided by 643.

Let's proceed to step 1:
If we divide 9 by 643, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 643

Step 2:
97 divided by 643 is 0 with a remainder of 97.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 97 leaves us with 97.
Take the next digit (4) from the dividend and append it to 97, then repeat: 974 / 643

Moving on to step 3:
If we divide 974 by 643, we get 1 and a remainder of 331.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 643 from 974 leaves us with 331.
Append the next digit (6) from the dividend to 331 and continue with: 3316 / 643

Going ahead to step 4:
643 goes into 3316 5 times with a remainder of 101.
The next digit of our result is 5. 
Result so far: 15.0
If we subtract 3215 from 3316, we get 101.
Fetch the next digit (1) from the dividend, attach it to 101 and continue: 1011 / 643

Advancing to step 5:
The number 643 fits into 1011 1 times, leaving a remainder of 368.
Write down 1 as next digit of the result. 
Result so far: 151.0
Subtracting 643 from 1011 leaves us with 368.
Grab the next digit (5) from the dividend, add it to 368, then carry on: 3685 / 643

Going ahead to step 6:
3685 divided by 643 is 5 with a remainder of 470.
Record the quotient 5 as the next digit in the result. 
Result so far: 1515.0
The remainder is 470 after subtracting 3215 from 3685.
Fetch the next digit (9) from the dividend, attach it to 470 and continue: 4709 / 643

Advancing to step 7:
If we divide 4709 by 643, we get 7 and a remainder of 208.
The number 7 becomes the next digit in our result. 
Result so far: 15157.0
Subtracting 4501 from 4709 leaves us with 208.
Fetch the next digit (9) from the dividend, attach it to 208 and continue: 2089 / 643

Step 8:
The number 643 fits into 2089 3 times, leaving a remainder of 160.
Use 3 as the next digit of our solution. 
Result so far: 151573.0
Subtract 1929 from 2089 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 9:
If we divide 1600 by 643, we get 2 and a remainder of 314.
Use 2 as the next digit of our solution. 
Result so far: 151573.2
Subtracting 1286 from 1600 leaves us with 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Moving on to step 10:
3140 divided by 643 is 4 with a remainder of 568.
The next digit of our result is 4. 
Result so far: 151573.24
Subtract 2572 from 3140 to get 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Step 11:
The number 643 fits into 5680 8 times, leaving a remainder of 536.
Write down 8 as next digit of the result. 
Result so far: 151573.248
If we take 5144 away from 5680, we end up with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Let's proceed to step 12:
When dividing 5360 by 643, we get 8 with a remainder of 216.
Use 8 as the next digit of our solution. 
Result so far: 151573.2488
The remainder is 216 after subtracting 5144 from 5360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The final outcome is 151573.2488, with a leftover of 0.00216.