We're dividing 620455 by 87 
We want to figure out the number of times 620455 can be divided by 87.

On to step 1:
6 divided by 87 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 87

Let's proceed to step 2:
The number 87 fits into 62 0 times, leaving a remainder of 62.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 62, we get 62.
Grab the next digit (0) from the dividend, add it to 62, then carry on: 620 / 87

Moving on to step 3:
87 can be fit into 620 7 times, resulting in a remainder of 11.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 609 from 620 to get 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 87

Advancing to step 4:
If we divide 114 by 87, we get 1 and a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 71.0
If we take 87 away from 114, we end up with 27.
Take the next digit (5) from the dividend and append it to 27, then repeat: 275 / 87

Advancing to step 5:
The number 87 fits into 275 3 times, leaving a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 713.0
Deduct 261 from 275 and we're left with 14.
Include the next digit (5) from the dividend after 14, then repeat: 145 / 87

Moving on to step 6:
When dividing 145 by 87, we get 1 with a remainder of 58.
The next digit of our result is 1. 
Result so far: 7131.0
If we take 87 away from 145, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 7:
87 goes into 580 6 times with a remainder of 58.
Record the quotient 6 as the next digit in the result. 
Result so far: 7131.6
Deduct 522 from 580 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 8:
87 goes into 580 6 times with a remainder of 58.
Record the quotient 6 as the next digit in the result. 
Result so far: 7131.66
Subtract 522 from 580 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final outcome is 7131.66, with a leftover of 0.058.