Bella eats 6 apples a day. If during the week she consumes a third of the apples Grace picks, how many apples will Grace have after 6 weeks?
Bella eats during the week, 6 apples/day * 7 days/week = 
<gadget id="calculator">6*7</gadget>
<output>42</output>
42 apples/week.
Grace harvests 42 apples/week * 3 = 
<gadget id="calculator">42*3</gadget>
<output>126</output>
126 apples during the week.
Leftover after Bella eats, 126 apples/week - 42 apples/week = 
<gadget id="calculator">126-42</gadget>
<output>84</output>
84 apples/week.
After 6 weeks Grace will have 84 apples/week * 6 weeks = 
<gadget id="calculator">84*6</gadget>
<output>504</output>
504 apples.

<result>504</result>