Henry drinks 15 bottles of kombucha every month.  Each bottle costs $3.00 and is eligible for a cash refund of $0.10 per bottle when he takes it to a recycling center.  After 1 year, how many bottles of kombucha will he be able to buy after he receives his cash refund?
He drinks 15 bottles every month and there are 12 months in 1 year so that's 15*12 = 
<gadget id="calculator">15*12</gadget>
<output>180</output>
180 bottles.
He earns $0.10 on every bottle that he recycles so that's .10*180 = $
<gadget id="calculator">.10*180</gadget>
<output>18</output>
18.00.
He has $18.00 and each bottle costs $3.00 so he can buy 18/3 = 
<gadget id="calculator">18/3</gadget>
<output>6</output>
6 bottles.

<result>6</result>