From Monday to Friday, Elle practices piano for 30 minutes. On Saturday, she practices piano three times as much as on a weekday. There is no practice on Sunday.  How many hours does Elle spend practicing piano each week?
From Monday to Friday, Elle practices 0.50 x 5 = 
<gadget id="calculator">0.50*5</gadget>
<output>2.5</output>
2.5 hours.
On Saturday, she practices 0.50 x 3 = 
<gadget id="calculator">0.50*3</gadget>
<output>1.5</output>
1.5 hours.
Each week, Elle practices piano for 2.5 + 1.5 = 
<gadget id="calculator">2.5+1.5</gadget>
<output>4</output>
4 hours.

<result>4</result>