Norma takes her clothes to the laundry. She leaves 9 T-shirts and twice as many sweaters as T-shirts in the washer. When she returns she finds 3 sweaters and triple the number of T-shirts. How many items are missing?
Norma left 9 T-shirts And twice as many sweaters, she took 9 * 2= 
<gadget id="calculator">9*2</gadget>
<output>18</output>
18 sweaters.
Adding the T-shirts and sweaters, Norma left 9 + 18 = 
<gadget id="calculator">9+18</gadget>
<output>27</output>
27 clothes.
When she came back, she found 3 sweaters And triple the number of T-shirts, she found 3 * 3 = 
<gadget id="calculator">3*3</gadget>
<output>9</output>
9 T-shirts.
Adding the T-shirts and sweaters, Norma found 3 + 9 = 
<gadget id="calculator">3+9</gadget>
<output>12</output>
12 clothes.
Subtracting the clothes she left from the clothes she found, 27 - 12 = 
<gadget id="calculator">27-12</gadget>
<output>15</output>
15 clothes are missing.

<result>15</result>