Answer:
8,146 x 121
Step-by-step explanation:
This is a problem in which you need to measure your understading of "orders of magnitude."
If the estimated answer is that means that we are looking at a multiplication in the "order of"
You need to look at the "orders of magnitude" of the things you're multiplying. In the first case, we have that would be "of the order of"
times
. So the whole multiplication would "of the order of"
or near
The correct answer, 8,146 x 121, is because it's "of the order of" times
and the gives us the
we need.