643157 ÷ 79 
We're looking to find how many times 79 goes into 643157.

Moving on to step 1:
When dividing 6 by 79, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 79

Step 2:
79 goes into 64 0 times with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Take the next digit (3) from the dividend and append it to 64, then repeat: 643 / 79

Advancing to step 3:
643 divided by 79 is 8 with a remainder of 11.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 632 from 643 to get 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 79

Moving on to step 4:
If we divide 111 by 79, we get 1 and a remainder of 32.
The next digit of our result is 1. 
Result so far: 81.0
Subtract 79 from 111 to get 32.
Append the next digit (5) from the dividend to 32 and continue with: 325 / 79

Moving on to step 5:
The number 79 fits into 325 4 times, leaving a remainder of 9.
The next digit of our result is 4. 
Result so far: 814.0
Deduct 316 from 325 and we're left with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 79

Going ahead to step 6:
When dividing 97 by 79, we get 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 8141.0
Subtract 79 from 97 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
180 divided by 79 is 2 with a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 8141.2
Subtract 158 from 180 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
79 goes into 220 2 times with a remainder of 62.
The next digit of our result is 2. 
Result so far: 8141.22
The remainder is 62 after subtracting 158 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The final outcome is 8141.22, with a leftover of 0.062.