chemical fertilizer factory produced 36,000 tons of fertilizers in the first quarter, and an average of 15,000 tons of fertilizers per month in the second quarter. How many tons of fertilizers did the factory produce on average in the first half of the year?
某化肥厂第一季度生产化肥3.6万吨，第二季度平均每月生产化肥1.5万吨，这个厂上半年平均每月生产化肥多少万吨？
<gadget id="calculator">1.5 * 3</gadget>
<output>4.5</output>

<gadget id="calculator">3.6 + 4.5</gadget>
<output>8.1</output>

<gadget id="calculator">8.1 / 6</gadget>
<output>1.35</output>

<result>1.35</result>