The advertising slogan of a certain instant noodle said: "25% of the free quantity, no price increase for additional quantity." The current weight of a bag of instant noodles is 120 grams. Do you know how many grams it was before the free quantity?
某方便面的广告语这样说："赠量25%，加量不加价．"一袋方便面现在的重量是120克，你知道赠量前是多少克吗？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">120 / (5/4)</gadget>
<output>96</output>

<result>96</result>