A 30% discount on a bag of rice can save 12 yuan. How much is the original price of this bag of rice?
一袋大米打七折可以少花12元，这袋大米原价是多少元？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">12 / (3/10)</gadget>
<output>40</output>

<result>40</result>