Last year Dallas was 3 times the age of his sister Darcy. Darcy is twice as old as Dexter who is 8 right now. How old is Dallas now?
Darcy = 2*Dexter = 2*8 = 16.
Last year Darcy was 16 - 1 = 
<gadget id="calculator">16-1</gadget>
<output>15</output>
15.
Dallas was 3 times Darcy last year = 3*15 = 
<gadget id="calculator">3*15</gadget>
<output>45</output>
45.
Dallas is a year older now = 45 + 1 = 
<gadget id="calculator">45+1</gadget>
<output>46</output>
46.
Dallas is 46 years old now.

<result>46</result>