Star Company saved an average of 8 tons of water per day in the second quarter of 2012. How many tons of water was saved in the second quarter?
星辰公司2012年第二季度平均每天节约用水8吨，第二季度共节约用水多少吨？
<gadget id="calculator">30 + 31 + 30</gadget>
<output>91</output>

<gadget id="calculator">91 * 8</gadget>
<output>728</output>

<result>728</result>