Turner wants to ride the rollercoaster 3 times, the Catapult 2 times and the Ferris wheel once. It costs 4 tickets to ride the rollercoaster, 4 tickets to ride the Catapult and 1 ticket to ride the Ferris wheel. How many tickets does Turner need?
The number of tickets needed for the rollercoaster is 3 rides * 4 tickets/ride = 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12 tickets.
The number of tickets needed for the Catapult is 2 rides * 4 tickets/ride = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 tickets.
The number of tickets needed for the Ferris wheel is 1 ride * 1 ticket/ride = 
<gadget id="calculator">1*1</gadget>
<output>1</output>
1 ticket.
Turner needs 12 tickets + 8 tickets + 1 tickets = 
<gadget id="calculator">12+8+1</gadget>
<output>21</output>
21 tickets.

<result>21</result>