Jenny goes to the florist to buy some flowers. Roses cost $2 each and $15 for a dozen. If she bought 15 roses and arrived with five 5 dollar bills and they only have quarters for change, how many quarters does she leave with?
Jenny has $25 because 5 x 5 = 
<gadget id="calculator">5*5</gadget>
<output>25</output>
25.
She buys 1 dozen roses and 3 single roses because 15 - 12 - 3 = 
<gadget id="calculator">15-12-3</gadget>
<output>0</output>
0.
She spends $6 on the single roses because 3 x 2 = 
<gadget id="calculator">3*2</gadget>
<output>6</output>
6.
She spends $21 on roses because 15 + 6 = 
<gadget id="calculator">15+6</gadget>
<output>21</output>
21.
She gets $4 in change because 25 - 21 = 
<gadget id="calculator">25-21</gadget>
<output>4</output>
4.
She gets 16 quarters because 4 x 4 = 
<gadget id="calculator">4*4</gadget>
<output>16</output>
16.

<result>16</result>