After the price of a bag of biscuits increases by 20%, each bag is 6 yuan, what is the original price?
一袋饼干涨价20%后，每袋6元，原价是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

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

<result>5</result>