A new arcade opens up and Jack decides to play with his 3 friends.  Jack can play a game with 1 quarter for 20 minutes.  Two of his friends are significantly worse than him and can only play half as long.  One of them is significantly better and can play for 1.5 times as long.  They play for 4 hours.  How much money is used?
Jack puts change in 60/20=
<gadget id="calculator">60/20</gadget>
<output>3</output>
3 times an hour.
So he spends 3*.25=$
<gadget id="calculator">3*.25</gadget>
<output>0.75</output>
.75 an hour.
His two friends add change 3*2=
<gadget id="calculator">3*2</gadget>
<output>6</output>
6 times an hour.
So they spend 6*.25=$
<gadget id="calculator">6*.25</gadget>
<output>1.5</output>
1.5 an hour.
His last friend puts in money 3/1.5=
<gadget id="calculator">3/1.5</gadget>
<output>2</output>
2 times an hour.
So he spends 2*.25=$
<gadget id="calculator">2*.25</gadget>
<output>0.5</output>
.50 an hour.
So in total they spend .75+1.5+.5=$
<gadget id="calculator">.75+1.5+.5</gadget>
<output>2.75</output>
2.75 an hour.
So they spend 2.75*4=$
<gadget id="calculator">2.75*4</gadget>
<output>11</output>
11 in the 4 hours.

<result>11</result>