Brittany uses 1/4 ounce of shampoo to wash her hair every other day. She buys shampoo in 14-ounce bottles. How many bottles does she need to get her through a leap year?
A leap year is one day shorter than a regular year, so it is 365 - 1 = 
<gadget id="calculator">365-1</gadget>
<output>364</output>
364 days.
Brittany washes her hair every other day, so she will wash it 364 / 2 = 
<gadget id="calculator">364/2</gadget>
<output>182</output>
182 times in a leap year.
A bottle of shampoo lasts her 14 / 1 / 4 = 14 * 4 = 56 washes.
If she buys 3 bottles, she will only have enough for 56 * 3 = 
<gadget id="calculator">3*56</gadget>
<output>168</output>
168 washes.
If she buys 4 bottles, she will have enough for 56 * 4 = 
<gadget id="calculator">4*56</gadget>
<output>224</output>
224 washes.
Since 168 &lt; 182 and 224 &gt; 182, Brittany needs 4 bottles of shampoo to get her through a leap year.

<result>4</result>