Merry is taking care of 10 lambs. Her brother takes care of 3 more lambs than Merry. How many lambs do Merry and her brother have?
Merry's brother takes care of 10 + 3 = 
<gadget id="calculator">10+3</gadget>
<output>13</output>
13 lambs.
So, together Merry and her brother have 10 + 13 = 
<gadget id="calculator">10+13</gadget>
<output>23</output>
23 lambs.

<result>23</result>