Let's divide 351090 by 87
Let's see how many times 87 fits into 351090.

Advancing to step 1:
If we divide 3 by 87, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 87

Moving on to step 2:
When dividing 35 by 87, we get 0 with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Take the next digit (1) from the dividend and append it to 35, then repeat: 351 / 87

Going ahead to step 3:
351 divided by 87 is 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 348 from 351 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 87

On to step 4:
If we divide 30 by 87, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we subtract 0 from 30, we get 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 87

Step 5:
If we divide 309 by 87, we get 3 and a remainder of 48.
Put 3 as the next digit of the answer. 
Result so far: 403.0
Subtracting 261 from 309 leaves us with 48.
Take the next digit (0) from the dividend and append it to 48, then repeat: 480 / 87

Let's proceed to step 6:
If we divide 480 by 87, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 4035.0
If we subtract 435 from 480, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
When dividing 450 by 87, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 4035.5
The remainder is 15 after subtracting 435 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 8:
87 can be fit into 150 1 times, resulting in a remainder of 63.
Put 1 as the next digit of the answer. 
Result so far: 4035.51
Deduct 87 from 150 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 9:
87 goes into 630 7 times with a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 4035.517
The remainder is 21 after subtracting 609 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
When dividing 210 by 87, we get 2 with a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 4035.5172
Subtracting 174 from 210 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
87 can be fit into 360 4 times, resulting in a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 4035.51724
If we subtract 348 from 360, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
120 divided by 87 is 1 with a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 4035.517241
If we take 87 away from 120, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 13:
The number 87 fits into 330 3 times, leaving a remainder of 69.
The next digit of our result is 3. 
Result so far: 4035.5172413
Deduct 261 from 330 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 14:
87 can be fit into 690 7 times, resulting in a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 4035.51724137
Deduct 609 from 690 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The final outcome is 4035.51724137, with a leftover of 8.1e-08.