其它
On Kangaroo planet each kangyear has 20 kangmonths and each kangmonth has 6 kangweeks, How many kangweeks are there in one quarter of a kangyear? 
Overseas Competition->Knowledge Point->Calculation Modules->Fractions
$\dfrac{1}{4}$kangyear x~$\dfrac{20\textbackslash{} kangmonths}{1\textbackslash{} kangyear}$~x~$\dfrac{6\textbackslash{} kangweeks}{1\textbackslash{} kangmonth}$~= 30 kangweeks. 