Hi!
Here's a little trick ;)
When dividing, you move the decimal point to the left
In this number, (1000) there are 3 zeros. Move the decimal point (which is currently behind 7) 3 places to the left
It becomes 0.067
So 67 divided by 1000 is 0.067
NOTE: This trick isn't going to work on all problems, only with numbers like this (1000, 100, etc) so please don't try this on all your questions.