The factory actually uses 190 tons of coal, which is 5% less than planned. How many tons of coal is planned?
工厂实际用煤190吨，比计划节约5%，计划用煤多少吨？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">190 / (19/20)</gadget>
<output>200</output>

<result>200</result>