Carrie wants to buy a new iPhone. The new iPhone costs $800. She can trade in her Samsung Galaxy for $240. She can make $80 per week babysitting. How many weeks does she have to work before she can purchase the iPhone?
The total cost of the iPhone will cost Carrie $800 - $240 = $
<gadget id="calculator">800-240</gadget>
<output>560</output>
560.
It will take her $560 / $80 = 
<gadget id="calculator">560/80</gadget>
<output>7</output>
7 weeks to earn enough money.

<result>7</result>