Let's divide 77437310 by 20
We want to divide 77437310 by 20.

Going ahead to step 1:
The number 20 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 20

Advancing to step 2:
77 divided by 20 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 60 from 77 leaves us with 17.
Append the next digit (4) from the dividend to 17 and continue with: 174 / 20

Advancing to step 3:
When dividing 174 by 20, we get 8 with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
Deduct 160 from 174 and we're left with 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 20

Step 4:
When dividing 143 by 20, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 387.0
The remainder is 3 after subtracting 140 from 143.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 20

Moving on to step 5:
37 divided by 20 is 1 with a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 3871.0
The remainder is 17 after subtracting 20 from 37.
Take the next digit (3) from the dividend and append it to 17, then repeat: 173 / 20

Moving on to step 6:
173 divided by 20 is 8 with a remainder of 13.
Record the quotient 8 as the next digit in the result. 
Result so far: 38718.0
If we take 160 away from 173, we end up with 13.
Append the next digit (1) from the dividend to 13 and continue with: 131 / 20

On to step 7:
20 can be fit into 131 6 times, resulting in a remainder of 11.
Put 6 as the next digit of the answer. 
Result so far: 387186.0
If we subtract 120 from 131, we get 11.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 20

Advancing to step 8:
If we divide 110 by 20, we get 5 and a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 3871865.0
If we take 100 away from 110, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
20 goes into 100 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 3871865.5
Deduct 100 from 100 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3871865.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3871865.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 3871865.5 with a remainder of 0.0.