We divide 78810197 by 642
Our goal is to divide 78810197 by 642.

Advancing to step 1:
The number 642 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 642

Advancing to step 2:
642 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Fetch the next digit (8) from the dividend, attach it to 78 and continue: 788 / 642

Let's proceed to step 3:
642 can be fit into 788 1 times, resulting in a remainder of 146.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 642 from 788 to get 146.
Take the next digit (1) from the dividend and append it to 146, then repeat: 1461 / 642

Advancing to step 4:
1461 divided by 642 is 2 with a remainder of 177.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1284 away from 1461, we end up with 177.
Include the next digit (0) from the dividend after 177, then repeat: 1770 / 642

Advancing to step 5:
When dividing 1770 by 642, we get 2 with a remainder of 486.
The number 2 becomes the next digit in our result. 
Result so far: 122.0
Subtract 1284 from 1770 to get 486.
Bring next digit (1) of the dividend behind the 486 and repeat the process: 4861 / 642

Let's proceed to step 6:
4861 divided by 642 is 7 with a remainder of 367.
The number 7 becomes the next digit in our result. 
Result so far: 1227.0
If we subtract 4494 from 4861, we get 367.
Grab the next digit (9) from the dividend, add it to 367, then carry on: 3679 / 642

Advancing to step 7:
The number 642 fits into 3679 5 times, leaving a remainder of 469.
Write down 5 as next digit of the result. 
Result so far: 12275.0
If we take 3210 away from 3679, we end up with 469.
Append the next digit (7) from the dividend to 469 and continue with: 4697 / 642

Moving on to step 8:
4697 divided by 642 is 7 with a remainder of 203.
The number 7 becomes the next digit in our result. 
Result so far: 122757.0
Deduct 4494 from 4697 and we're left with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

On to step 9:
If we divide 2030 by 642, we get 3 and a remainder of 104.
Record the quotient 3 as the next digit in the result. 
Result so far: 122757.3
Subtract 1926 from 2030 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 10:
When dividing 1040 by 642, we get 1 with a remainder of 398.
The next digit of our result is 1. 
Result so far: 122757.31
If we take 642 away from 1040, we end up with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Going ahead to step 11:
642 goes into 3980 6 times with a remainder of 128.
The next digit of our result is 6. 
Result so far: 122757.316
If we take 3852 away from 3980, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 12:
1280 divided by 642 is 1 with a remainder of 638.
The next digit of our result is 1. 
Result so far: 122757.3161
If we subtract 642 from 1280, we get 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

Going ahead to step 13:
If we divide 6380 by 642, we get 9 and a remainder of 602.
Use 9 as the next digit of our solution. 
Result so far: 122757.31619
The remainder is 602 after subtracting 5778 from 6380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Let's proceed to step 14:
The number 642 fits into 6020 9 times, leaving a remainder of 242.
Use 9 as the next digit of our solution. 
Result so far: 122757.316199
If we subtract 5778 from 6020, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

After the division, we end up with 122757.316199 and a remainder of 2.42e-05.