A public official wants to donate 5 new soccer balls per each class in two schools. Each school has 4 elementary school classes and 5 middle school classes.  How many soccer balls would the public official donate in all?
Each school has 4 + 5 = 
<gadget id="calculator">4+5</gadget>
<output>9</output>
9 classes.
So, there are a total of 9 x 2 = 
<gadget id="calculator">9*2</gadget>
<output>18</output>
18 classes for the 2 schools.
Therefore, the public official donates a total of 18 x 5 = 
<gadget id="calculator">18*5</gadget>
<output>90</output>
90 soccer balls.

<result>90</result>