A tape recorder is now priced at 180 yuan, which is 10% lower than the original price. How much is the original price of the tape recorder?
一台录音机现在售价180元，比原价降低了10%，录音机的原价是多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 / (9/10)</gadget>
<output>200</output>

<result>200</result>