Grandma Olga has 3 daughters and 3 sons.  If all her daughters each have 6 sons, and each of her sons has 5 daughters, how many grandchildren does she have in total?
From her daughters, Olga has 3 x 6 = 
<gadget id="calculator">3*6</gadget>
<output>18</output>
18 grandsons.
From her sons, she has 3 x 5 = 
<gadget id="calculator">3*5</gadget>
<output>15</output>
15 granddaughters.
Altogether, Olga has 18 + 15 = 
<gadget id="calculator">18+15</gadget>
<output>33</output>
33 grandchildren.

<result>33</result>