By drawing two straight lines divide the face of the clock into three regions such that the numbers in each regions have the same total

10 + 9 + 3 + 4

8 + 7 + 6 + 5

that means you will draw one line below the 11 and across to below the 2 and the second line would be above the 8 and across to below the 4. 

Seeing is believing . . .draw and label a clock face then add the two lines! 

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.