If there is a price difference of 5.4 yuan between the 10% discount and the 30% discount for a commodity, what is the original price of the commodity?
一件商品，对原价打九折和打七折后的售价相差5.4元，那么此商品的原价是多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(9/10) - (7/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5.4 / (1/5)</gadget>
<output>27</output>

<result>27</result>