Answer:
1000
Step-by-step explanation:
Doing this on a calculator yields 1000.
Alternatively, do part or all of the problem in your head:
Rewrite 42 ÷____= 0.042 as
42
------------
0.042
and move the decimal points 3 place to the right:
42 becomes 42000, and 0.042 becomes 42. Thus, we have:
42000
------------ = 1000
42
