John receives $100 from his uncle and gives his sister Jenna 1/4 of that money. He goes and buys groceries worth $40. How much money does John have remaining?
When John gives his sister 1/4 of his money, he parts with 1/4*100 = 
<gadget id="calculator">1/4*100</gadget>
<output>25</output>
25 dollars.
Johns remains with 100-25 = 
<gadget id="calculator">100-25</gadget>
<output>75</output>
75 dollars.
When he buys groceries worth $40, he remains with 75-40 = 
<gadget id="calculator">75-40</gadget>
<output>35</output>
35 dollars.

<result>35</result>