Let's divide 66390788 by 620
Our goal is to divide 66390788 by 620.

Step 1:
620 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 620

Moving on to step 2:
620 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 620

Let's proceed to step 3:
When dividing 663 by 620, we get 1 with a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 620 from 663 and we're left with 43.
Fetch the next digit (9) from the dividend, attach it to 43 and continue: 439 / 620

Let's proceed to step 4:
620 can be fit into 439 0 times, resulting in a remainder of 439.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 439, we get 439.
Grab the next digit (0) from the dividend, add it to 439, then carry on: 4390 / 620

Advancing to step 5:
620 can be fit into 4390 7 times, resulting in a remainder of 50.
The number 7 becomes the next digit in our result. 
Result so far: 107.0
If we take 4340 away from 4390, we end up with 50.
Append the next digit (7) from the dividend to 50 and continue with: 507 / 620

Let's proceed to step 6:
The number 620 fits into 507 0 times, leaving a remainder of 507.
Record the quotient 0 as the next digit in the result. 
Result so far: 1070.0
Subtracting 0 from 507 leaves us with 507.
Take the next digit (8) from the dividend and append it to 507, then repeat: 5078 / 620

Moving on to step 7:
If we divide 5078 by 620, we get 8 and a remainder of 118.
Write down 8 as next digit of the result. 
Result so far: 10708.0
Subtract 4960 from 5078 to get 118.
Fetch the next digit (8) from the dividend, attach it to 118 and continue: 1188 / 620

Going ahead to step 8:
If we divide 1188 by 620, we get 1 and a remainder of 568.
Record the quotient 1 as the next digit in the result. 
Result so far: 107081.0
Deduct 620 from 1188 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Step 9:
620 goes into 5680 9 times with a remainder of 100.
The number 9 becomes the next digit in our result. 
Result so far: 107081.9
The remainder is 100 after subtracting 5580 from 5680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 10:
The number 620 fits into 1000 1 times, leaving a remainder of 380.
Put 1 as the next digit of the answer. 
Result so far: 107081.91
Subtract 620 from 1000 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 11:
620 goes into 3800 6 times with a remainder of 80.
The next digit of our result is 6. 
Result so far: 107081.916
Deduct 3720 from 3800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
620 can be fit into 800 1 times, resulting in a remainder of 180.
Write down 1 as next digit of the result. 
Result so far: 107081.9161
The remainder is 180 after subtracting 620 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 13:
620 can be fit into 1800 2 times, resulting in a remainder of 560.
The next digit of our result is 2. 
Result so far: 107081.91612
If we take 1240 away from 1800, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Step 14:
The number 620 fits into 5600 9 times, leaving a remainder of 20.
Record the quotient 9 as the next digit in the result. 
Result so far: 107081.916129
If we subtract 5580 from 5600, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 15:
200 divided by 620 is 0 with a remainder of 200.
The next digit of our result is 0. 
Result so far: 107081.916129
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 16:
If we divide 2000 by 620, we get 3 and a remainder of 140.
Put 3 as the next digit of the answer. 
Result so far: 107081.91612903
If we take 1860 away from 2000, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final outcome is 107081.91612903, with a leftover of 1.4e-07.