Roy has saved 40% more in money earned by chores than his brother Anthony.  Anthony has saved $10.00 more than their sister Eva.   Eva has saved $20.00.  How much money does Roy have?
Anthony has saved $10.00 more than Eva who has $20.00 so he has 10+20 = $
<gadget id="calculator">10+20</gadget>
<output>30</output>
30.00.
Roy has saved 40% more than his brother who has $30.00 so Roy has saved .40*30 = $12.00.
All total, Roy has 12.00 more than his brother, so he has 12+30 = $
<gadget id="calculator">12+30</gadget>
<output>42</output>
42.00.

<result>42</result>