Jan buys 5 dozen roses.  Each rose cost $6.  Since he bought so many he only needs to pay 80%.  How much did he pay?
He got 5*12=
<gadget id="calculator">5*12</gadget>
<output>60</output>
60 roses.
So the cost was 6*60=$
<gadget id="calculator">6*60</gadget>
<output>360</output>
360.
So he has to pay 360*.8=$
<gadget id="calculator">360*.8</gadget>
<output>288</output>
288.

<result>288</result>