Alvin owns coconut trees that yield 5 coconuts each. If a coconut can be sold for $3 and Alvin needs $90, how many coconut trees does he have to harvest?
Alvin needs to harvest 90/3= 
<gadget id="calculator">90/3</gadget>
<output>30</output>
30 coconuts to earn $90.
Therefore, the total number of trees that he has to harvest is 30/5= 
<gadget id="calculator">30/5</gadget>
<output>6</output>
6.

<result>6</result>