A mobile phone is sold at a 15% discount, which is 180 yuan cheaper. How much is the price of this phone before discount?
一部手机打八五折出售，便宜了180元．这部手机打折前的售价为多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">180 / (3/20)</gadget>
<output>1_200</output>

<result>1_200</result>