If a product is sold at a discount of 20% off the price, and the price is 120 yuan, what is the original price of this product?
一件商品若按定价打八折出售，售价为120元，那么这件商品的原价为多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>