1000
1000
872 rounded to the nearest ten is 870
The number is already rounded to a greater degree than that!
492 million 872 thousand 641 = 492,872,641
1000
0
1000
872 rounded to the nearest ten is 870
0.87
The answer is 80,000,000,000
The number is already rounded to a greater degree than that!
900
492 million 872 thousand 641 = 492,872,641
870
492,872,641
The answer depends on the units used for 8.275. It should be blindingly obvious to anybody that the answer for 8.275 grams and 8.275 tons, for example, will be very different.