A pile of coal weighs 570 tons in total. It is planned to be used for one year. In the first quarter, 135 tons were used. How many tons will be used on average in each quarter?
一堆煤共重570吨，计划用一年，第一季度用了135吨，剩下的平均每个季度用多少吨？
<gadget id="calculator">570 - 135</gadget>
<output>435</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">435 / 3</gadget>
<output>145</output>

<result>145</result>