A store sells umbrellas with a 20% discount. Mr. Wang found out that this can save 6 yuan. Do you know how much the original price of this umbrella is?
某商店雨伞打8折销售，王老师发现这样可以节省6元钱，你知道这把雨伞原价多少元吗？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 / (1/5)</gadget>
<output>30</output>

<result>30</result>