Max fills up water balloons for 30 minutes at a rate of 2 water balloons every minute. Max’s friend Zach fills up water balloons for 40 minutes at a rate of 3 water balloons every minute. In the process, 10 of the water balloons pop on the ground. How many filled water balloons do Max and Zach have in total?
Max fills 30 * 2 = 
<gadget id="calculator">30*2</gadget>
<output>60</output>
60 water balloons.
Zach fills 40 * 3 = 
<gadget id="calculator">40*3</gadget>
<output>120</output>
120 water balloons.
Max and Zach have a total of 60 + 120 - 10 = 
<gadget id="calculator">60+120-10</gadget>
<output>170</output>
170 water balloons.

<result>170</result>