One millimeter equals $1000$ micrometers. The following program intends to read a floating$-$point value from input, convert the value from micrometers to millimeters, and output the length in millimeters, but the code contains three errors. Find and fix all three errors.

Ex: If the input is $2\mathrm{.}7,$ then the output is:

$0\mathrm{.}003$ millimeters