Justice has 3 ferns, 5 palms, and 7 succulent plants in her house. If she wants a total of 24 plants in her home, how many more plants does she need?
Justice currently has 3 + 5 + 7 = 
<gadget id="calculator">3+5+7</gadget>
<output>15</output>
15 plants in her house.
Justice needs 24 - 15 = 
<gadget id="calculator">24-15</gadget>
<output>9</output>
9 more plants.

<result>9</result>