Discard unwanted digits in Mql4

 
Hello,
How can I change a double value say 0.1784257 to 0.1
When I used NormalizeDouble(0.1784257,1) it was converted to 0.2   I don't want a rounded number. I need just first one digit after the decimal point. Any help please...
 
Hii thanks for your reply. I solved it by using Mathfloor function.
Reason: