42906485 ÷ 87 
Our goal is to divide 42906485 by 87.

Advancing to step 1:
If we divide 4 by 87, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 87

Advancing to step 2:
The number 87 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (9) from the dividend and append it to 42, then repeat: 429 / 87

Going ahead to step 3:
87 can be fit into 429 4 times, resulting in a remainder of 81.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 81 after subtracting 348 from 429.
Append the next digit (0) from the dividend to 81 and continue with: 810 / 87

On to step 4:
810 divided by 87 is 9 with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 49.0
Subtract 783 from 810 to get 27.
Fetch the next digit (6) from the dividend, attach it to 27 and continue: 276 / 87

Step 5:
The number 87 fits into 276 3 times, leaving a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 493.0
Subtract 261 from 276 to get 15.
Append the next digit (4) from the dividend to 15 and continue with: 154 / 87

Advancing to step 6:
If we divide 154 by 87, we get 1 and a remainder of 67.
Put 1 as the next digit of the answer. 
Result so far: 4931.0
Deduct 87 from 154 and we're left with 67.
Take the next digit (8) from the dividend and append it to 67, then repeat: 678 / 87

Moving on to step 7:
87 goes into 678 7 times with a remainder of 69.
The next digit of our result is 7. 
Result so far: 49317.0
Subtracting 609 from 678 leaves us with 69.
Bring next digit (5) of the dividend behind the 69 and repeat the process: 695 / 87

On to step 8:
695 divided by 87 is 7 with a remainder of 86.
The number 7 becomes the next digit in our result. 
Result so far: 493177.0
The remainder is 86 after subtracting 609 from 695.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Going ahead to step 9:
When dividing 860 by 87, we get 9 with a remainder of 77.
The next digit of our result is 9. 
Result so far: 493177.9
Deduct 783 from 860 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 10:
If we divide 770 by 87, we get 8 and a remainder of 74.
Write down 8 as next digit of the result. 
Result so far: 493177.98
Subtract 696 from 770 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 11:
If we divide 740 by 87, we get 8 and a remainder of 44.
The next digit of our result is 8. 
Result so far: 493177.988
Subtracting 696 from 740 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The quotient of the division is 493177.988, and the remainder is 0.0044.