The factory plans to use 45 tons of coal. The first 15 days will use an average of 1.3 tons of coal per day, and the remaining 25 days will be used. How many tons of coal will be used on average per day?
工厂计划用煤45吨，前15天平均每天用煤1.3吨，剩下的要用25天，剩下的煤平均每天要用多少吨？
<gadget id="calculator">1.3 * 15</gadget>
<output>19.5</output>

<gadget id="calculator">45 - 19.5</gadget>
<output>25.5</output>

<gadget id="calculator">25.5 / 25</gadget>
<output>1.02</output>

<result>1.02</result>