Indras has 6 letters in her name. Her sister's name has 4 more letters than half of the letters in Indras' name. How many letters are in Indras and her sister's names?
I = 
<gadget id="calculator">6</gadget>
<output>6</output>
6.
Sister = 6/2 + 4 = 
<gadget id="calculator">6/2+4</gadget>
<output>7</output>
7
6 + 7 = 
<gadget id="calculator">6+7</gadget>
<output>13</output>
13 letters.
Together Indras and her sister have 13 letters in their names.

<result>13</result>