Jay went to watch a singer in a one hour 20 minutes concert.  If there was a 10-minute intermission, and all the songs were 5 minutes except for one song that lasted 10 minutes, how many songs did she sing?
The time the singer had for singing was 80 - 10 = 
<gadget id="calculator">80-10</gadget>
<output>70</output>
70 minutes.
The time the singer had for singing 5-minute songs was 70 - 10 = 60 minutes.
The number of 5-minute songs was 60 / 5 = 
<gadget id="calculator">60/5</gadget>
<output>12</output>
12 songs.
The total number of songs sung is 12 + 1 = 
<gadget id="calculator">12+1</gadget>
<output>13</output>
13 songs.

<result>13</result>