ue aide en physique svp

<span style="margin: 2px; float: left; width: 380px;"><IFRAME src="https://ouedtaga.7olm.org/h1-p1" width=335 height=295 scrolling=auto frameborder=1 > </IFRAME></span> <P align=center>kanoun la place houwa <BR><BR><BR>
<DIV align=left><FONT size=5>f=i*l*b*sint<BR>hal houwa kadalik <BR>f=N*b*i*l*sint<BR>????????????????????????????????????????<BR></FONT></DIV>