64. The means or instrumentality through which an act is accomplished is
expressed by use of the preposition "per":
Oni kudras per kudrilo, one sews by means of (with) a needle.
La birdoj flugas per flugiloj, the birds fly by (with) wings.
Li amuzas sin per tiuj bildoj,
he amuses himself with (by) those pictures.
Mi trovis gxin per via helpo, I found it by (through) your help.