Aida has twice as many dolls as Sophie, and Sophie has twice as many dolls as Vera. How many dolls do Aida, Sophie, and Vera have combined if Vera has 20 dolls?
If Sophie has twice as many dolls as Vera, then she has 2 * 20 dolls = 
<gadget id="calculator">2*20</gadget>
<output>40</output>
40 dolls.
Aida has 2 * 40 dolls = 
<gadget id="calculator">2*40</gadget>
<output>80</output>
80 dolls, twice the number Sophie has.
In total, they have 80 dolls + 40 dolls + 20 dolls = 
<gadget id="calculator">80+40+20</gadget>
<output>140</output>
140 dolls.

<result>140</result>