70178680 ÷ 643 
We want to figure out the number of times 70178680 can be divided by 643.

Moving on to step 1:
If we divide 7 by 643, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 643

On to step 2:
643 can be fit into 70 0 times, resulting in a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 70 leaves us with 70.
Append the next digit (1) from the dividend to 70 and continue with: 701 / 643

Going ahead to step 3:
When dividing 701 by 643, we get 1 with a remainder of 58.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 643 from 701, we get 58.
Grab the next digit (7) from the dividend, add it to 58, then carry on: 587 / 643

On to step 4:
643 can be fit into 587 0 times, resulting in a remainder of 587.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 587 to get 587.
Take the next digit (8) from the dividend and append it to 587, then repeat: 5878 / 643

Step 5:
The number 643 fits into 5878 9 times, leaving a remainder of 91.
Write down 9 as next digit of the result. 
Result so far: 109.0
Subtracting 5787 from 5878 leaves us with 91.
Take the next digit (6) from the dividend and append it to 91, then repeat: 916 / 643

Going ahead to step 6:
If we divide 916 by 643, we get 1 and a remainder of 273.
The number 1 becomes the next digit in our result. 
Result so far: 1091.0
If we subtract 643 from 916, we get 273.
Take the next digit (8) from the dividend and append it to 273, then repeat: 2738 / 643

Let's proceed to step 7:
When dividing 2738 by 643, we get 4 with a remainder of 166.
The next digit of our result is 4. 
Result so far: 10914.0
Subtract 2572 from 2738 to get 166.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 643

On to step 8:
If we divide 1660 by 643, we get 2 and a remainder of 374.
Put 2 as the next digit of the answer. 
Result so far: 109142.0
Subtract 1286 from 1660 to get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

On to step 9:
643 can be fit into 3740 5 times, resulting in a remainder of 525.
Use 5 as the next digit of our solution. 
Result so far: 109142.5
Deduct 3215 from 3740 and we're left with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Step 10:
The number 643 fits into 5250 8 times, leaving a remainder of 106.
Record the quotient 8 as the next digit in the result. 
Result so far: 109142.58
If we take 5144 away from 5250, we end up with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Step 11:
643 can be fit into 1060 1 times, resulting in a remainder of 417.
Use 1 as the next digit of our solution. 
Result so far: 109142.581
Subtracting 643 from 1060 leaves us with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

On to step 12:
4170 divided by 643 is 6 with a remainder of 312.
Write down 6 as next digit of the result. 
Result so far: 109142.5816
If we take 3858 away from 4170, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 13:
643 goes into 3120 4 times with a remainder of 548.
The next digit of our result is 4. 
Result so far: 109142.58164
The remainder is 548 after subtracting 2572 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

On to step 14:
643 can be fit into 5480 8 times, resulting in a remainder of 336.
Use 8 as the next digit of our solution. 
Result so far: 109142.581648
Deduct 5144 from 5480 and we're left with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Advancing to step 15:
643 can be fit into 3360 5 times, resulting in a remainder of 145.
The number 5 becomes the next digit in our result. 
Result so far: 109142.5816485
The remainder is 145 after subtracting 3215 from 3360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 16:
643 goes into 1450 2 times with a remainder of 164.
Put 2 as the next digit of the answer. 
Result so far: 109142.58164852
Subtracting 1286 from 1450 leaves us with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

The final outcome is 109142.58164852, with a leftover of 1.64e-07.