There is a pile of coal in a certain factory. It was originally planned to burn 1.2 tons per day, which can last for 25 days. Due to the improved technology, the actual burning time was 30 days. How many tons of coal was actually saved per day compared to the plan?
某工厂有一堆煤，原计划每天烧1.2吨，可以烧25天．由于改进了技术，实际烧了30天，实际每天比计划节约了多少吨煤？
<gadget id="calculator">25 / 30</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1.2 * (5/6)</gadget>
<output>1</output>

<gadget id="calculator">1.2 - 1</gadget>
<output>0.2</output>

<result>0.2</result>