How do you round this?
The first step is to determine where the ten-thousands place is. Most people 'count' the digits from right to left starting at the decimal point: "ones", "tens", "hundreds", "thousands", "ten thousands" -- five places left of the decimal point. In this case the digit is 8.
Next you check the value of the next digit to the right. If it is 5 or greater we round up and if less than 5 we round down. In this case the next digit to the right is 9, so we round up. This means that the digit at the ten thousands place (8) is increased by 1 and becomes 9. The rest of the digits are changed to zero so the answer is 5,790,000.
The problem is more difficult if the digit to be rounded up is 9. Increasing 9 by 1 makes it 10, so we have to carry. This means that the number 5,796,123 is rounded to 5,800,000.