retaining number values

Entering numbers consecutively in same formular cell and want the value saved to another cell without having to copy and paste value only. eg a2=a1*2. enter values in a1 1.2.3 etc and want values saved to other cells.Disd it once and forgot how!! cheers.

Nick's picture

try to explain again... what

try to explain again...

what value to do want in which cell ?