The price of a product has been increased by 20% because of its popularity, but it can only be sold at a 25% discount due to seasonal changes. The current price is 90 yuan. How much is the original price of this product?
一种商品由于热销，因此提价20%，后因季节改变，只能打七五折销售，现在售价90元，这种商品原来售价多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<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">90 / (3/4) / (6/5)</gadget>
<output>100</output>

<result>100</result>