The factory shipped a batch of coal, planned to burn 1% per day, but actually saved 20% per day, which was 30 kg less than the original plan, how many kg was actually burned per day?
工厂运来一批煤，计划每天烧1%，实际每天节约20%，比原计划每天少烧30千克，实际每天烧多少千克？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / (1/5)</gadget>
<output>150</output>

<gadget id="calculator">150 - 30</gadget>
<output>120</output>

<result>120</result>