Rick can iron 4 dress shirts in an hour.  He can iron 3 dress pants in an hour.  If he spends 3 hours ironing dress shirts and 5 hours ironing dress pants, how many pieces of clothing has he ironed?
Rick has ironed 4 x 3 = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 dress shirts.
He has ironed 3 x 5 = 
<gadget id="calculator">3*5</gadget>
<output>15</output>
15 dress pants.
In total, he has ironed 12 + 15 = 
<gadget id="calculator">12+15</gadget>
<output>27</output>
27 pieces of clothes.

<result>27</result>