Alex makes luxury dresses out of silk. Each dress needs 5 meters of silk and Alex has 600 meters of silk in storage. His friends also want to learn how to make these dresses so Alex gives all 5 of them 20 meters of silk each. He uses the rest to make dresses himself. How many dresses can Alex make?
Alex gives his friends a total of 5 friends * 20 meters of silk = 
<gadget id="calculator">5*20</gadget>
<output>100</output>
100 meters of silk.
This means he has 600 - 100 = 
<gadget id="calculator">600-100</gadget>
<output>500</output>
500 meters of silk left in storage.
He can therefore make 500 meters of silk / 5 meters of silk per dress = 
<gadget id="calculator">500/5</gadget>
<output>100</output>
100 dresses.

<result>100</result>