A canteen originally used an average of 42 tons of coal per month. After improving the stove, the original annual coal consumption can now be used for 2 more months. How many tons of coal is the average monthly consumption now?
某食堂原来平均每月用煤42吨，改进炉灶后，原来一年的用煤量现在可以多用2个月，现在平均每月用煤多少吨？
<gadget id="calculator">12 + 2</gadget>
<output>14</output>

<gadget id="calculator">12 / 14</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">42 * (6/7)</gadget>
<output>36</output>

<result>36</result>