87058864 ÷ 840 
We want to figure out the number of times 87058864 can be divided by 840.

Let's proceed to step 1:
When dividing 8 by 840, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 840

Let's proceed to step 2:
840 goes into 87 0 times with a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 87 leaves us with 87.
Bring next digit (0) of the dividend behind the 87 and repeat the process: 870 / 840

Step 3:
The number 840 fits into 870 1 times, leaving a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 840 from 870 to get 30.
Grab the next digit (5) from the dividend, add it to 30, then carry on: 305 / 840

Advancing to step 4:
840 can be fit into 305 0 times, resulting in a remainder of 305.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
The remainder is 305 after subtracting 0 from 305.
Include the next digit (8) from the dividend after 305, then repeat: 3058 / 840

Advancing to step 5:
The number 840 fits into 3058 3 times, leaving a remainder of 538.
Write down 3 as next digit of the result. 
Result so far: 103.0
If we subtract 2520 from 3058, we get 538.
Append the next digit (8) from the dividend to 538 and continue with: 5388 / 840

Going ahead to step 6:
840 goes into 5388 6 times with a remainder of 348.
Put 6 as the next digit of the answer. 
Result so far: 1036.0
Subtract 5040 from 5388 to get 348.
Fetch the next digit (6) from the dividend, attach it to 348 and continue: 3486 / 840

Advancing to step 7:
840 can be fit into 3486 4 times, resulting in a remainder of 126.
Record the quotient 4 as the next digit in the result. 
Result so far: 10364.0
If we take 3360 away from 3486, we end up with 126.
Append the next digit (4) from the dividend to 126 and continue with: 1264 / 840

On to step 8:
The number 840 fits into 1264 1 times, leaving a remainder of 424.
The next digit of our result is 1. 
Result so far: 103641.0
Deduct 840 from 1264 and we're left with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Step 9:
4240 divided by 840 is 5 with a remainder of 40.
Write down 5 as next digit of the result. 
Result so far: 103641.5
If we subtract 4200 from 4240, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
840 can be fit into 400 0 times, resulting in a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 103641.5
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 11:
When dividing 4000 by 840, we get 4 with a remainder of 640.
Write down 4 as next digit of the result. 
Result so far: 103641.504
The remainder is 640 after subtracting 3360 from 4000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 12:
The number 840 fits into 6400 7 times, leaving a remainder of 520.
Write down 7 as next digit of the result. 
Result so far: 103641.5047
Subtract 5880 from 6400 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Let's proceed to step 13:
If we divide 5200 by 840, we get 6 and a remainder of 160.
Use 6 as the next digit of our solution. 
Result so far: 103641.50476
If we subtract 5040 from 5200, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
The number 840 fits into 1600 1 times, leaving a remainder of 760.
The next digit of our result is 1. 
Result so far: 103641.504761
If we take 840 away from 1600, we end up with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Step 15:
When dividing 7600 by 840, we get 9 with a remainder of 40.
The number 9 becomes the next digit in our result. 
Result so far: 103641.5047619
If we subtract 7560 from 7600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 16:
The number 840 fits into 400 0 times, leaving a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 103641.5047619
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 103641.5047619 with a remainder of 4e-07.