Multiplication of all numbers in a cell by a specific number

I have a small problem. I would like to multiply all the numbers in a cell from a new line by 1.8, but unfortunately I am getting gently lost. I tried combining with array and split but in the end I was unsuccessful.

>Solution :

For Google sheets try the following:

=BYROW(B111:B114, 
   LAMBDA(y, 
     INDEX(IFERROR(JOIN(CHAR(10),(SPLIT(y,CHAR(10))*2))))))

(Do adjust the formula according to your ranges and locale)