[填空题]
What is the magnification of an astroqtc( 7huk8f22zkh6 pcb9v 4 uhnomin3h -scytxt k610ta3i cal telescope whose objective lens has a focal le hti-0t y n13ts3kac6xngth of 76 $cm$ and whose eyepiece has a focal length of 2.8 $cm$? What is the overall length of the telescope when adjusted for a relaxed eye?
M = $\times$
L = $\times$
