41977579 ÷ 642 
We want to figure out the number of times 41977579 can be divided by 642.

On to step 1:
642 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 642

On to step 2:
41 divided by 642 is 0 with a remainder of 41.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 41 to get 41.
Append the next digit (9) from the dividend to 41 and continue with: 419 / 642

On to step 3:
The number 642 fits into 419 0 times, leaving a remainder of 419.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 419 and we're left with 419.
Fetch the next digit (7) from the dividend, attach it to 419 and continue: 4197 / 642

Going ahead to step 4:
642 can be fit into 4197 6 times, resulting in a remainder of 345.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 345 after subtracting 3852 from 4197.
Grab the next digit (7) from the dividend, add it to 345, then carry on: 3457 / 642

On to step 5:
642 can be fit into 3457 5 times, resulting in a remainder of 247.
Use 5 as the next digit of our solution. 
Result so far: 65.0
The remainder is 247 after subtracting 3210 from 3457.
Grab the next digit (5) from the dividend, add it to 247, then carry on: 2475 / 642

Moving on to step 6:
If we divide 2475 by 642, we get 3 and a remainder of 549.
The next digit of our result is 3. 
Result so far: 653.0
The remainder is 549 after subtracting 1926 from 2475.
Append the next digit (7) from the dividend to 549 and continue with: 5497 / 642

Moving on to step 7:
642 goes into 5497 8 times with a remainder of 361.
Record the quotient 8 as the next digit in the result. 
Result so far: 6538.0
Deduct 5136 from 5497 and we're left with 361.
Take the next digit (9) from the dividend and append it to 361, then repeat: 3619 / 642

Let's proceed to step 8:
If we divide 3619 by 642, we get 5 and a remainder of 409.
Put 5 as the next digit of the answer. 
Result so far: 65385.0
If we subtract 3210 from 3619, we get 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Going ahead to step 9:
642 can be fit into 4090 6 times, resulting in a remainder of 238.
The number 6 becomes the next digit in our result. 
Result so far: 65385.6
If we subtract 3852 from 4090, we get 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

On to step 10:
The number 642 fits into 2380 3 times, leaving a remainder of 454.
Use 3 as the next digit of our solution. 
Result so far: 65385.63
The remainder is 454 after subtracting 1926 from 2380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Advancing to step 11:
4540 divided by 642 is 7 with a remainder of 46.
Use 7 as the next digit of our solution. 
Result so far: 65385.637
Subtract 4494 from 4540 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 12:
When dividing 460 by 642, we get 0 with a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 65385.637
The remainder is 460 after subtracting 0 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Let's proceed to step 13:
642 can be fit into 4600 7 times, resulting in a remainder of 106.
The number 7 becomes the next digit in our result. 
Result so far: 65385.63707
Subtract 4494 from 4600 to get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Advancing to step 14:
When dividing 1060 by 642, we get 1 with a remainder of 418.
The next digit of our result is 1. 
Result so far: 65385.637071
If we take 642 away from 1060, we end up with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Advancing to step 15:
642 can be fit into 4180 6 times, resulting in a remainder of 328.
Put 6 as the next digit of the answer. 
Result so far: 65385.6370716
If we subtract 3852 from 4180, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Moving on to step 16:
The number 642 fits into 3280 5 times, leaving a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 65385.63707165
Subtracting 3210 from 3280 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final outcome is 65385.63707165, with a leftover of 7e-08.