78459920 divided by 946 
We want to figure out the number of times 78459920 can be divided by 946.

Step 1:
When dividing 7 by 946, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 946

On to step 2:
78 divided by 946 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (4) from the dividend, attach it to 78 and continue: 784 / 946

Advancing to step 3:
When dividing 784 by 946, we get 0 with a remainder of 784.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 784 to get 784.
Include the next digit (5) from the dividend after 784, then repeat: 7845 / 946

Step 4:
If we divide 7845 by 946, we get 8 and a remainder of 277.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 277 after subtracting 7568 from 7845.
Fetch the next digit (9) from the dividend, attach it to 277 and continue: 2779 / 946

Let's proceed to step 5:
If we divide 2779 by 946, we get 2 and a remainder of 887.
Put 2 as the next digit of the answer. 
Result so far: 82.0
If we take 1892 away from 2779, we end up with 887.
Append the next digit (9) from the dividend to 887 and continue with: 8879 / 946

Moving on to step 6:
If we divide 8879 by 946, we get 9 and a remainder of 365.
Write down 9 as next digit of the result. 
Result so far: 829.0
Subtract 8514 from 8879 to get 365.
Grab the next digit (2) from the dividend, add it to 365, then carry on: 3652 / 946

Advancing to step 7:
When dividing 3652 by 946, we get 3 with a remainder of 814.
Put 3 as the next digit of the answer. 
Result so far: 8293.0
Subtract 2838 from 3652 to get 814.
Append the next digit (0) from the dividend to 814 and continue with: 8140 / 946

Step 8:
946 can be fit into 8140 8 times, resulting in a remainder of 572.
The number 8 becomes the next digit in our result. 
Result so far: 82938.0
Deduct 7568 from 8140 and we're left with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Advancing to step 9:
When dividing 5720 by 946, we get 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 82938.6
Subtract 5676 from 5720 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 10:
If we divide 440 by 946, we get 0 and a remainder of 440.
The next digit of our result is 0. 
Result so far: 82938.6
Subtracting 0 from 440 leaves us with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Advancing to step 11:
946 can be fit into 4400 4 times, resulting in a remainder of 616.
Record the quotient 4 as the next digit in the result. 
Result so far: 82938.604
Subtracting 3784 from 4400 leaves us with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 12:
946 goes into 6160 6 times with a remainder of 484.
Put 6 as the next digit of the answer. 
Result so far: 82938.6046
Subtracting 5676 from 6160 leaves us with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Let's proceed to step 13:
946 goes into 4840 5 times with a remainder of 110.
Record the quotient 5 as the next digit in the result. 
Result so far: 82938.60465
Subtract 4730 from 4840 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 14:
When dividing 1100 by 946, we get 1 with a remainder of 154.
The number 1 becomes the next digit in our result. 
Result so far: 82938.604651
Deduct 946 from 1100 and we're left with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Going ahead to step 15:
1540 divided by 946 is 1 with a remainder of 594.
Put 1 as the next digit of the answer. 
Result so far: 82938.6046511
Deduct 946 from 1540 and we're left with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

The final outcome is 82938.6046511, with a leftover of 5.94e-06.