It takes 15 mink skins to make a coat. Andy buys 30 minks and each mink has 6 babies, but half the total minks are set free by activists. How many coats can he make?
First find the total number of baby minks: 30 minks * 6 babies/mink = 
<gadget id="calculator">30*6</gadget>
<output>180</output>
180 minks.
Add this to the number of adult minks: 180 minks + 30 minks = 
<gadget id="calculator">180+30</gadget>
<output>210</output>
210 minks.
Then divide this number in half to find how many aren't set free: 210 minks / 2 = 
<gadget id="calculator">210/2</gadget>
<output>105</output>
105 minks.
Then divide the remaining number of minks by the number of minks per coat to find the number of coats: 105 minks / 15 minks/coat = 
<gadget id="calculator">105/15</gadget>
<output>7</output>
7 coats.

<result>7</result>