Auto (drag)incrementing only one cell value in Excel

For example, I have one table with values:

14.10%    
1.60%   
2.80%

and I have a cell with value I want to multiply each table row by, eg L15=300

I want to multiply every value by 300, so I put

=A1*L15
=A2*L15

and then drag it down but unfortunately the L15 is incrementing as well:

=A3*L17
=A4*L18 
etc.

Is there any way in excel to auto increment only first part of the equation (all A cells?)

Thank you

=A1*$L$15

The dollar sign specifies an absolute (fixed) reference. Without the dollar sign, you’ll get a relative reference by default, which is what you’re seeing when you autofill.

More info here.

Yes, use absolute references

$L$15